I need help please I’m lost

I Need Help Please Im Lost

Answers

Answer 1
Thanks for the equation:

3, 1, 2

3 is the most likely because the chances are out of 2 classes instead of 2, which is one class.

1 is the number of people is also included in 2.

Hope this helps!

Related Questions

Two angles form a linear pair. the measure of one angle is 26∘26∘ greater than the measure of the other angle. find the measure of each angle.

Answers

A linear pair is a pair of angles that form a line. And since they form a line, when added, they equal 180.

x = one angle....y = the other one
x + y = 180
x = y + 26
time to sub
y + 26 + y = 180
2y + 26 = 180
2y = 180 - 26
2y = 154
y = 154/2
y = 77 <=== this is one angle

x = y + 26
x = 77 + 26
x = 103 <=== and the other one
Final answer:

The measure of the smaller angle is 77 degrees, and the measure of the larger angle is 103 degrees.

Explanation:

Let's represent the measure of the smaller angle as x degrees. Since the measure of one angle is 26 degrees greater than the other angle, the measure of the larger angle can be represented as x + 26 degrees.



According to the definition of a linear pair, the sum of the measures of two angles forming a linear pair is always 180 degrees. So we can write the equation:



x + (x + 26) = 180



Solving this equation, we get: 2x + 26 = 180



2x = 180 - 26



2x = 154



x = 154/2



x = 77



Therefore, the smaller angle measures 77 degrees and the larger angle measures 77 + 26 = 103 degrees.

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On a farm, there are 20 fewer cows than twice the number of pigs. If there are 50 cows, how many pigs are there? Write a two step equation to model the scenario and answer it.

Answers

Let p represent pigs
50=2p-20
p=35

ax+2xy=14 solving for y

Answers

y= (14-Ax)/(2x); you first subtract the Ax on both sides, then divide by 2x for both sides and your result is fourteen minus Ax divided by 2x.

Answer:

[tex]y=\dfrac{14-Ax}{2x}[/tex]

Step-by-step explanation:

The given expression is :

[tex]Ax+2xy=14[/tex].............(1)

We need to find the value of y. Subtracting "Ax" on both sides of equation (1) as :

[tex]Ax-Ax+2xy=14-ax[/tex]

[tex]2xy=14-Ax[/tex]

Dividing both sides of above equation by "2x" as :

[tex]\dfrac{2xy}{2x}=\dfrac{14-Ax}{2x}[/tex]

[tex]y=\dfrac{14-Ax}{2x}[/tex]

So, the value of y is, [tex]y=\dfrac{14-Ax}{2x}[/tex]. Hence, this is the required solution.

round to the nearest tenth.

Answers

[tex]\bf \cfrac{425~\underline{ft}}{\underline{h}}\cdot \cfrac{12~in}{\underline{ft}}\cdot \cfrac{\underline{h}}{60~min}\implies\cfrac{425\cdot 12~in}{60~min}\implies \cfrac{5100~in}{60~min}\implies 85\frac{in}{min}[/tex]

Which expression is equal to 2−√ 32 ?
8i√2

−8√2

8√2i

−8i√2

Answers

Answer:

A. [tex]8i\sqrt{2}[/tex]

Step-by-step explanation:

We have been given a radical expression [tex]2\sqrt{-32}[/tex]. We are asked to find equivalent expression to our given expression.

Using radical rule [tex]\sqrt{-a}=\sqrt{-1}\cdot \sqrt{a}[/tex], we can write [tex]\sqrt{-32}[/tex] as product of [tex]\sqrt{-1}\cdot\sqrt{32}[/tex].

[tex]2\sqrt{-32}=2\cdot \sqrt{-1}\cdot\sqrt{32}[/tex]

Substitute [tex]\sqrt{-1}=i[/tex]:

[tex]2\sqrt{-32}=2i\cdot\sqrt{32}[/tex]

[tex]2\sqrt{-32}=2i\cdot\sqrt{2\cdot 16}[/tex]

[tex]2\sqrt{-32}=2i\cdot\sqrt{2\cdot 4^2}[/tex]

[tex]2\sqrt{-32}=2*4i\cdot\sqrt{2}[/tex]

[tex]2\sqrt{-32}=8i\sqrt{2}[/tex]

Therefore, the equivalent expression would be [tex]8i\sqrt{2}[/tex].

The expression which is equal to 2√-32 is; 8i√2

According to the question, we have been given the radical expression; 2√-32

First, the expression can be evaluated as follows;

=2√-32

= 2√-1 × 32

We must recall that, In complex numbers, √-1 = i.

= 2i√32

= 2i√16 ×2

= 8i√2

Therefore, the expression which is equal to 2√- 32 is:. 8i√2

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A scientist inoculates mice, one at a time, with a disease germ until he finds 2 that have contracted the disease. if the probability of contracting the disease is 1/6, what is the probability that 8 mice are required?

Answers

There are several possible events that lead to the eighth mouse tested being the second mouse poisoned. There must be only a single mouse poisoned before the eighth is tested, but this first poisoning could occur with the first, second, third, fourth, fifth, sixth, or seventh mouse. Thus there are seven events that describe the scenario we are concerned with. With each event, we want two particular mice to become diseased (1/6 chance) and the remaining six mice to remain undiseased (5/6 chance). Thus, for each of the seven events, the probability of this event occurring among all events is (1/6)^2(5/6)^6. Since there are seven of these events which are mutually exclusive, we sum the probabilities: our desired probability is 7(1/6)^2(5/6)^6 = (7*5^6)/(6^8).

There are 2.54 centimeters in an inch how many inches are in 51.78 centimeters round to the nearest tenths

Answers

2.54 cm in 1 inch......how many inches in 51.78 cm...

51.78 / 2.54 = 20.4 inches <==

or this way...
2.54 / 1 = 51.78 / x....2.54 cm to 1 in = 51.78 cm to x inches
cross multiply
(2.54)(x) = 51.78)(1)
2.54x = 51.78
x = 51.78 / 2.54
x = 20.4 inches <==

Imagine that last night you saw the star betelgeuse just starting to rise on your eastern horizon at 7:15 pm. at 7:15 pm tonight, will betelgeuse be above, below, or exactly on your eastern horizon?

Answers

The Earth orbits around the sun toward the east. Since it takes about 365 days to complete 360 degrees around the sun, the Earth moves about 1 degree each day. In order for us to see Betelgeuse on the eastern horizon the next day, the Earth would only need to rotate 359 degrees. This 359-degree rotation plus the 1 degree motion around the sun would be 360 degrees. So we would look at about 7:11 pm, because it takes the Earth about 4 minutes to rotate 1 degree. Therefore, at 7:15 pm the next night, Betelgeuse will be a little above the eastern horizon.

Final answer:

Betelgeuse will be either just above the horizon or at virtually the same position on the eastern horizon at 7:15 pm the next day, as stars like Betelgeuse rise in the east and set in the west, completing a rotation around the celestial sphere in about 24 hours.

Explanation:

The question pertains to the observation of the star Betelgeuse and its position relative to the horizon at a specific time from one day to the next. Since most stars rise in the east and set in the west, completing one full rotation around the celestial sphere in approximately 24 hours, we can infer that Betelgeuse will follow a similar path. However, due to Earth's rotation, any given star will appear to rise and set four minutes earlier each night, due to the Earth’s orbit around the Sun completing an extra degree each day. This might suggest that Betelgeuse would be slightly above the horizon at 7:15 pm the following night. Yet, the student should be aware that this four-minute difference can be negligible, and for practical observing purposes, Betelgeuse will be seen rising at virtually the same time, hence nearly at the same position on the horizon.

Simplify square root of 5 plus the square root of 125 plus 25. I don't understand. Can someone please help me?

Answers

 √ 5  + √ 125 + 25 [original problem - I assume 25 is not under a root]

√5 + √ 25·5  + 25  [find perfect square factors of 125]
√5 + 5√5   +25      [simplify √125]
6√5 + 25    [add 1√5 + 5√5 together]


***If the 25 is under a root, simply take it's square root (5) and add it to the end of the problem. The answer would be 6√5 + 5***
5(sqrt{20}) - 2(sqrt{125}) 
You need to simplify the square roots individually. 
For each square root, look for two numbers that, when multiplied, will yield the number inside the radicand. However, one of the factors has to be a perfect square. 
sqrt{20} = sqrt{4} times sqrt{5} 
The square root of 4 is a perfect square because 2 times 2 = 4. 
Then, the square root of 4 = 2. 
The square root of 5 is NOT a perfect square and it is also in lowest term.
So, leave it alone. 

============================== 
sqrt{125} = sqrt{25} times sqrt{5} 
The square root of 25 is 5 because 5 times 5 = 25. 
Then, the square root of 25 is 5. 
Again, the square root of 5 is NOT a perfect square and it is also in lowest term. Leave it alone. 
We now have this: 
5(2)(sqrt{5}) - 2(5)(sqrt{5}) 
10(sqrt{5}) - 10(sqrt(5}) = 0 
The answer is 0. 

Eli took the fleet of 8 vans for oil changes. All of the vans needed windshield wipers which cost $24 per van. The total bill was $432. Write an equation to find out what oil change cost . Solve the equation

Answers

What you do is 24(8)=192

Then you do 432-192=240

Then you 240/8=30

The answer is $30 per oil change and $240 for all the oil changes together.

Hope this helps and please make mine the Brainliest answer!
an oil change will cost $30 

A national achievement test is administered annually to 3rd graders. the test has a mean score of 100 and a standard deviation of 15. if jane's z-score is 1.20, what was her score on the test?

Answers

Answer:

118.

Step-by-step explanation:

Final answer:

To find Jane's score on the national achievement test with a given mean of 100 and standard deviation of 15, we calculate it using her z-score of 1.20 to get her score of 118.

Explanation:

The question asks: A national achievement test is administered annually to 3rd graders. The test has a mean score of 100 and a standard deviation of 15. If Jane's z-score is 1.20, what was her score on the test.

To find Jane score on the test, we use the formula for calculating scores from z-scores: Score = Mean + (Z-score × Standard Deviation).

Given that the mean is 100 and the standard deviation is 15, and Jane's z-score is 1.20, we can calculate her score as follows:

Score = 100 + (1.20 × 15)Score = 100 + 18Score = 118

Therefore, Jane's score on the national achievement test was 118.

Please help with this question: A brick company guarantees to fill a contractor's order to within 5% accuracy. A contractor orders 1,500 bricks. Please write and solve an absolute-value equation to find the maximum and minimum number of bricks guaranteed.

Answers

1425 is the min 1575 is the max

Write the equation of a line that has a slope 1/3 and y-intercept 4.

Answers

Y=mx+b, where m represents the slope and b represents the y-intercept. If you plug in the numbers, you get the equation, y=(1/3)x+4
Final answer:

In slope-intercept form, y = (1/3)x + 4 can be used to represent the equation of a line with a slope of 1/3 and a y-intercept of 4.

Explanation:

In mathematics particularly in algebra, the equation of a line is usually formulated in the slope-intercept form, which is y = mx + b. Where m is the slope of the line and b is the y-intercept. For a line with a slope of 1/3 and y-intercept of 4, you would substitute 1/3 for m and 4 for b. Therefore, the equation of the line would be y = (1/3)x + 4

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Convert 30 feet per second to miles per minute.

5280 ft = 1 mi



Round to the nearest hundredth.

Answers

We know that:

1 mile = 5280 ft

1 minute = 60 sec

 

Therefore to convert this we simply use the conversion factors:

 

(30 ft / s) * (60 s / 1 min) * (1 mi / 5280 ft) = 0.34 mi / min

 

 

So we got 0.34 miles per minute.

How do I find the domain of a function

Answers

it is how much the x values can expand on a graph
Final answer:

The domain of a function is the set of all possible input values that can be inserted into the function. The domain can be numerical or non-numerical, depending on what the function describes.

Explanation:

In mathematics, finding the domain of a function involves identifying all possible values that can be inserted into the function. A function's domain can be a set of numerical values or a set of non-numerical values.

For example, if we have a function based on majors at a university, the domain could take form as X = {English, Mathematics, ...}, i.e., a list of all the majors offered at the university, plus undeclared, which are all possible inputs into the function.

Similarly, if we have a random variable X = hair color, then the domain of X would include all possible hair colors.

If the function is based on numerical variables, such as a Quadratic Function, the domain would be the set of all real numbers. For instance, the domain of Y = {0, 1, 2, ...} consists of the integers from zero up to a certain limit. Generally, the domain of a function is the set of all possible input values that will produce a value in the function.

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Given: f(x)=x²-3 and g(x)=x+1. What is the composite function gOf?

1. x²+2x-2

2. x²+2x-2

3. x²-2

Answers

gOf = g(f(x))
so
g(f(x)) = (x^2 - 3) + 1
g(f(x)) = x^2 - 2

answer

3. x²-2

For two given functions f(x) and g(x), the composite function

(g ° f)(x) is: g(f(x))

Here we will find that the correct option is the last one:

(g°f)(x) = x²-2

To get this, we know that:

g(x) = x + 1

f(x) = x² - 3

Then:

(g°f)(x) = g(f(x))

So here we just need to evaluate g(x) in f(x):

g(f(x)) = f(x) + 1 = ( x² - 3) + 1 = x² - 3 + 1 = x² - 2

Then the correct option is 3:

(g°f)(x) = x²-2

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Please help me! Im really confused on how to solve problems like this

Answers

a = -bc
÷-c ÷-c
b = a ÷ -c
To solve this problem, we must isolate b from the rest of the problem.

a= -bc

Firstly, divide -bc by c

a/c=-bc/c

The c on -bc cancels out

a/c=-b

Transfer the negative to he other side of the equation

b= -a/c

The temperature in a town is 36.6F during the day and -12.6F at night what is the temperature change from day to night

Answers

24F was the temperature change from day to night
Final answer:

The temperature changes by 49.2F from day to night. You calculate this by subtracting the night temperature from the day temperature and remembering to treat subtraction of a negative as addition.

Explanation:

The subject of your question is the calculation of temperature change, which is a simple subtraction problem in mathematics. Given a temperature of 36.6F during the day and a temperature of -12.6F at night, you can find the temperature change by subtracting the night temperature from the day temperature.

So, it will be 36.6F - (-12.6F) equals 49.2F. It's important to note here that subtracting a negative number is the same as adding a positive number which is why we add 12.6F instead of subtracting it.

This means, the temperature changes by 49.2F from day to night.

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Suppose that there are three astronauts outside a spaceship and they decide to play catch. all the astronauts weigh the same on earth and are equally strong. the first astronaut throws the second one toward the third one and the game begins. describe the motion of the astronauts as the game proceeds. how long will the game last?

Answers

The 3rd astronaut would catch the 2nd astronaut and throw the 2nd astronaut towards the 1st and the game would end there. The key thing to remember is conservation of momentum. Since all of the astronauts have the same mass and strength, I will be introducing a unit called "A" which represents the maximum momentum that one astronaut can produce while throwing another. So here's the game of catch, throw by throw. Before the game begins, I will assume all three astronauts are stationary and have 0 momentum. So Astronaut 1 = 0 A (Stationary, next to astronaut 2) Astronaut 2 = 0 A (Stationary, next to astronaut 1) Astronaut 3 = 0 A (Stationary) 1st astronaut grabs the 2nd astronaut and throws him towards the 3rd. Since every action has an equal and opposite reaction, what will happen is the 1st astronaut will be sent moving backwards with a momentum of -1/2A and the 2nd astronaut will be heading towards the 3rd with a momentum of +1/A. So we're left with Astronaut 1 = -1/2 A (Moving to the left) Astronaut 2 = +1/2 A (Moving to the right) Astronaut 3 = 0 A (Stationary) Now the 3rd astronaut catches the 2nd who was thrown at him. Both of them continue moving in the same direction as the 2nd astronaut was just prior to being caught, but at a reduced velocity, giving Astronaut 1 = -1/2 A (Moving to the left) Astronaut 2 = +1/4 A (Moving to the right, slowly) Astronaut 3 = +1/4 A (Moving to the right, slowly) Finally, Astronaut 3 throws astronaut 2 back towards Astronaut 1, giving Astronaut 1 = -1/2 A (Moving to the left) Astronaut 2 = +1/4 A -1/2A = -1/4A (Moving to the left, slowly) Astronaut 3 = +1/4 A +1/2A = +3/4A (Moving to the right, rapidly) So what you're left with is Astronaut 1 moving to the left faster than Astronaut 2, so those two astronauts will never catch each other. Meanwhile, Astronaut 3 is moving to the right and getting further and further away from the other 2 astronauts. So none of the astronauts will ever be able to catch or throw anyone ever again.

Best buy shoes had a back to school special. The total bill for four pairs of shoes came to $69.24 ( before tax ) What was the average price for each pair of shoes?
QUESTION 2 If you only purchased 1 pair of shoes at Best Buy Shoes instead of the four described in problem 20, how much would you have paid, based on the average price?

Answers

Answer: a) $17.31, b) $17.31.

Step-by-step explanation:

Since we have given that

Total bill for four pairs of shoes = $69.24

Number of pairs of shoes = 4

We need to find the average price for each pair of shoes .

So, Average price would be

[tex]\dfrac{\text{Total amount}}{\text{Number of pairs of shoes}}\\\\=\dfrac{69.24}{4}\\\\=\$17.31[/tex]

If he purchased only 1 pair of shoes, the amount he has to pay based on average price would be $17.31.

Hence, a) $17.31, b) $17.31.

Final answer:

The average price for each pair of shoes from the total bill of $69.24 is $17.31. If only one pair of shoes was purchased, it would also cost $17.31.

Explanation:

To find the average price for each pair of shoes in the first question, you divide the total bill by the number of pairs of shoes. In this case, the total bill is $69.24 for four pairs of shoes.

Step-by-step calculation:

Divide the total cost ($69.24) by the number of pairs (4).

The calculation will be $69.24 / 4 = $17.31.

The average price for each pair of shoes is $17.31.

For the second question, if you were to purchase only one pair of shoes, the cost would be equal to this average price, which is $17.31.

If f(x)=x^2-3x,find f(-18). Show work

Answers

Answer: 378

-------------------------------------
-------------------------------------

Work Shown:

f(x) = x^2 - 3x
f(x) = ( x )^2 - 3*( x )
f(-18) = ( -18 )^2 - 3*( -18 ) ... replace every x with -18; now use PEMDAS
f(-18) = 324 - 3*( -18 )
f(-18) = 324 + 54
f(-18) = 378

Name two congruent angles that measure 15

Answers

Congruent angles have the same angle measures.
So: x + x = 15
2 x = 15
x = 15 : 2
x = 7.5°
Answer:
Those congruent angles measure 7.5° or 7° 30``.

For about 10 years after the french revolution, the french government attempted to base measures of time on multiples of ten: one week consisted of 10 days, one day consisted of 10 hours, one hour consisted of 100 minutes, and one minute consisted of 100 seconds. what are the ratios of (a) the french decimal week to the standard week and (b) the french decimal second to the standard second? assume that the definition of a "day" remains the same.

Answers

Final answer:

Explanation of the ratios of French decimal time to standard time after the French Revolution.

Explanation:

Ratio of French Decimal Week to Standard Week:

1 French decimal week = 10 days, whereas 1 standard week = 7 days. So, the ratio is 10/7.

Ratio of French Decimal Second to Standard Second:

1 French decimal second = 0.01 standard second since 1 hour = 100 French decimal minutes = 100 x 0.01 = 1 standard hour.

(a) The ratio of the French decimal week to the standard week is [tex]\( \frac{10}{7} \)[/tex].

(b) The ratio of the French decimal second to the standard second is [tex]\( \frac{5}{3} \)[/tex].

To find the ratios of the French decimal week to the standard week and the French decimal second to the standard second, we'll compare the durations of these units in the French decimal system to those in the standard system.

(a) Ratio of the French decimal week to the standard week:

In the French decimal system:

- One French decimal week consists of 10 days.

In the standard system:

- One standard week consists of 7 days.

So, the ratio of the French decimal week to the standard week is:

[tex]\[ \text{Ratio} = \frac{\text{French decimal week}}{\text{Standard week}} = \frac{10 \text{ days}}{7 \text{ days}} \][/tex]

(b) Ratio of the French decimal second to the standard second:

In the French decimal system:

- One minute consists of 100 seconds.

In the standard system:

- One minute consists of 60 seconds.

So, the ratio of the French decimal second to the standard second is:

[tex]\[ \text{Ratio} = \frac{\text{French decimal second}}{\text{Standard second}} = \frac{100 \text{ seconds}}{60 \text{ seconds}} \][/tex]

Now, let's simplify these ratios:

(a) Ratio of the French decimal week to the standard week:

[tex]\[ \frac{10}{7} \][/tex]

(b) Ratio of the French decimal second to the standard second:

[tex]\[ \frac{100}{60} = \frac{5}{3} \][/tex]

So, the ratios are:

(a)  for the French decimal week to the standard week.

(b) [tex]\( \frac{5}{3} \)[/tex] for the French decimal second to the standard second.

Sari has 3 times as many pencils as sam.together they have 28 pencils how many more pencils does sari have

Answers

Sam has 7
Sari has 21

7 + 3(7) = 28
7 + 21 = 28
28 = 28
answer checks out.

I basically plugged and chugged for this one.

When the sun is at 31 above the horizon, a tree casts a 42 ft. shadow. how tall is the tree?

Answers

Answer: 25.2361459992ft

This question can be solved by a trigonometric equation. Shadow formed when something with height like a tree, so it can be pictured as a vertical line. Shadow is a length of and can be pictured as a horizontal line.  
In trigonometric, to find the vertical line length with horizontal line you need tan function. The sun angle will be used in the function, so the calculation would be: tan(31) x 42ft = 25.2361459992ft

Jennifer is saving money to buy a bike. The bike costs $245. She has $125 saved, and each week she adds $15 to her savings. How long will it take her to save enough money to buy the bike?

Answers

8 weeks. it is easy if you work backwards 245-125=120

120/15=8

∠E and ∠F are vertical angles with m∠E=5x+10 and m∠F=7x−12 .

What is the value of x?

Answers

vertical angles are equal

5x + 10 = 7x - 12
5x - 7x = -12 - 10
-2x = -22
x = -22/-2
x = 11 <===

Answer:  11

Step-by-step explanation:

We are given that ∠E and ∠F are vertical angles with m∠E=5x+10 and m∠F=7x−12 .

We know that vertical angles are congruent, then their measures must be equal.

i.e. if ∠E and ∠F are vertical angles.

⇒ m∠E=m∠F

[tex]\Rightarrow\ 5x+10=7x-12[/tex]   [Substitute the measures of ∠E and ∠F]

Subtract 5x from both sides , we get

[tex]10=2x-12[/tex]

Add 12 on both sides , we get

[tex]22=2x[/tex]

Divide both sides by 2 , we get

[tex]11=x[/tex] or x=11

Hence, the value of x= 11

Andreas invested $1000 in savings account. After 4 years, the account had earned a total of $112 simple interest without any additional deposits. What was his interest rate.

Answers

R = 112/1000 x 4 = 0.028 x 100 (find percentage) = 2.8%

find the slope and y-intercept of the line that is parallel to y=-x-1 and passes through the point (5,-5)

Answers

hello :
an equation in​ slope-intercept form : y + 5 = -1(x - 5)...(paralel : same slope -1)
y = -x
y-intercept when : x = 0  : y=0

Which is the best estimate of -14 1/9 (-2 9/10)

Answers

The answer is:  [D]:  "42" .
_______________________________
Explanation:  
________________________________________________________
Consider the "1/9" to be close to "1/10" ; (that is; "0.1" ; since "0.1 = 1/10" ) .

Note that a "negative value" multiplied by a "negative value" equals a "positive value". 

Round the "14.1" to "14" ; and the "2.9" to "3" ;
_______________________________________

-14.1 * -2.9 ≈  14* 3 = 42
_______________________________________
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