Mathematics High School

1. round the result to 2 decimal places. -0.9x+2.8=4.1
a) -2.56
b) -2.56
c) -1.44
d) 2.20

2. jordan has 650 pennies. he plans to give 85 to his brother and split with his twin sister. he wants to know how many pennies to keep for himself. which equation models the situation?
a) 2(85+2x=650
b) 85(x-2)=650
c) 85x=650
d) 85+2x=650

Answers

Answer 1
1. -0.9x+2.8=4.1
First subtract 2.8 from both sides.
-0.9x = 1.3
Now divide both sides by -0.9.
x = -1.4444..
This can be rounded to -1.44
c) -1.44

2. Jordan has 650 pennies. He'll give 85 to his brother and split the rest with his sister.
d) 85+2x=650

Related Questions

What is the measure of each of the following angles? If m

Answers

it would be 45 degrees as it is on a straight line
id say about 30-45*                                                     

Which of these is correct?
A) 30,792 is greater than 31,875.
B) 31,875 is greater than 32,496.
C) 31,875 is greater than 30,792.
D) 32,496 is less than 31,875.

Answers

The correct answer is:  [C]:  " 31,875 is greater than 30,792. "
__________________________________________________________

460=50+12m what does m stand for?

Answers

50 + 12m = 460
Subtract 50 from both sides
12m = 410
Divide 12 from both sides to isolate m
m = 34 1/6
This equation should of be written as 460=12m+50, not 460=50+12m, but either way, 12 is the amount of something that being multiply by, or the slope, 50 is the y-intercept, and m is the thing that I mentioned earlier.

Translate the sentence into an equation using n as the unknown number. Then solve the equation for n. Two times a number increased by 5 is 15. a. 2n(5) = 15 n = 1.5 c. 2n + 5 = 15 n = 20 b. 2n + 5=15 n = 5 d. n + 5 = 15 n = 10 Please select the best answer from the choices provided A B C D

Answers

2n+5=15
n=5
Looks like B

How do you solve this 2 step equation: 8+b/-4=5

Answers

I'm going to rewrite the equation assuming this is the correct form:
[tex]8 - \frac{b}{4} = 5 \newline -8 + 8 - \frac{b}{4} = 5 - 8 \newline (-4)\cdot -\frac{b}{4} = -3 \cdot (-4) \newline b = -12[/tex]

Suppose that there is a positive correlation between the variables k and I. If l is 75when k is 7, which of these is most likely to be the value of l when k is 14.

Answers

positive correlation varies jointly

I = ck
75 = c(7)
75/7 = c
10.71 = c

I = (10.71)k
I = (10.71)(14)
I = 150

Answer:

l = 150

Step-by-step explanation:

The numbers k and have a positive correlation, to know the correlation between these two variables we have to use the values they give us:

When l = 75 the k = 7

The correlation between the two numbers is division. So this can be written as:

correlation: I = 75/7 k

So if we substitute k=14

l = 75/7 * 14

l = 150

We can also get this number by rule of three:

75/7 = x/14

75/7 *14 = l

1050/7 = l

150 = l

Select a counter-example that makes the conclusion false.
You select three marbles from a bag and each of them is black.
Conclusion: All the marbles in the bag are black.

Counterexample:

Answers

A counter-example could be

There are more than 3 marbles in the bag, and the other ones are red.

Hope this helps!

A counterexample showing the conclusion 'All the marbles in the bag are black' as false.

A counterexample is a scenario where the premises are true but the conclusion is false, demonstrating the invalidity of an argument. In this case, to prove invalidity, a counterexample could be a situation where there is at least one marble in the bag that is not black. For instance, if there are three black marbles and one red marble inside the bag, the selection of three black marbles is still possible, but the conclusion that all marbles are black is false.

Which statement best describes why the sale price is a function of the original price

Answers

what ever is the variable between the original sale and the sale price . meaning whats the diffrence how much did the price rise or lower 

Two consecutive integers have a sum of 81 . find the integers.

Answers

let the first one be x, the second one is then x+1
x+(x+1)=81
2x=80
x=40
the two consecutive integers are: 40, 41

TheValue of a stock begins at $0.05/and increase by 0.01 each month write an equation representing the value of the stock v in any months m

Answers

Because you start with $0.05, you're going to add that to whatever 0.01 is equal to after the amount of months

the equation I got was: v=0.05+(0.01m)

The linear equation can be represented as a straight line on a graph. The equation for the given case is v = 0.05 + 0.01m.

What is a Linear equation?

A linear equation is a equation that has degree as one.

To find the solution of n unknown quantities n number of equations with n number of variables are required.

Given that,

The value of stock at the beginning is $0.05,

And, its rate of increase for each month is 0.01.

Suppose the value of stock be v and the month be m,

Then, the increment in its value for any month m  is $0.01m.

Now, the equation for the value of stock v at any month m can be written by summing its initial value to its increment value obtained for each month as,

v = 0.05 + 0.01m.

Hence, the equation representing the value of the stock v in any months m is given as v = 0.05 + 0.01m.

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How many words of length over alphabet s contain exactly two distinct letters?

Answers

The english alphabet contains 2121 consonants and 55 vowels. How many strings of 66 lowercase letters of the English alphabet contain

a) exactly 1 vowel
b) exactly 2 vowels
c) at least one vowel
d) at least two vowels

5 x 2 x (-4) + 6 divided by 2

43
-37
-23
-17

Answers

There is a certain order that we follow in doing any mathematical operation:
First we get rid of any operation within brackets, then we do multiplication and divisions and finally we do additions and subtractions.

We need to evaluate: 5x2x(-4) + 6:
So since we have no operations within brackets, then we will do the multiplications first (in their order) then the addition:
5x2x(-4)+6 = 10x(-4)+6 = -40+6 = -34

Now, we need to divide -34 by 2:
-34/2 = -17

The answer is: -17

how do you put 2.303,2.3,2.33 and 2.03 from least to greatest

Answers

you add extra zeroes until all numbers have the same quantity. in this case, 2.303 has three numbers after the decimal, so the other three number need it too. 2.300, 2.330, and 2.030. now that you have all of them looking the same now, you can tell which is least and work from there: 2.030 is the least, then 2.300, 2.303 then 2.330 is the largest.

The number can be arranged from least to greatest as 2.03<2.3<2.303<2.33.

What are decimal Numbers?

A decimal is a number with a whole and a fractional portion. Decimal numbers are between integers and indicate numerical value for a whole plus some fraction of a whole. In fraction form, we may say there is one and one-half pizzas. This is represented in decimal form as 1.5 pizzas.

Let's write the numbers to the third decimal point. Therefore, we can write the numbers as,

2.303 = 2.3032.3 = 2.3002.33 = 2.3302.03 = 2.030

Now, the numbers can be arranged as,

2.030 < 2.300 < 2.303 < 2.330

2.03 < 2.3 < 2.303 < 2.33

Hence, the number can be arranged from least to greatest as 2.03<2.3<2.303<2.33.

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Joe sold 15 T-shirts for a total of $82.50.
What is the unit price?

Answers

5.5 is my predicted answer
Just divide the 82.50 by 15 and your answer is answer for unit

The graph shows a rectangle that has been rotated. Which statement is FALSE?

Answers

We need the question and the statements in order to know

It’s D cuz after rotation I don’t think it’ll still be in the same position

Fred completen 10 math problems This is 40 percent of the number of math problems he has to do How many math problems must he do

Answers

he got 4 out of the 10 right how you do that you would divide the two numbers together

Answer:

15 more/ 25 problems in total

Step-by-step explanation:

The formula for the area of a triangle is A = bh, where b is the length of the base and h is the height. The equation solved for h is h = .

Find the height of a triangle that has an area of 30 square units and a base measuring 12 units.

3 units
5 units
8 units
9 units

Answers

a=bxh
h=a/b
h=30/12
h=2.5
The correct answer is 5 units 

The mass of a proton is approximately 1.67 x 10−24, and the mass of an electron is approximately 9.11 x 10−28. Find the approximate ratio of the mass of the proton to the mass of the electron.

Answers

1.67x[10^(-20)] 1.67x[10^(-24+28)]
--------------------- = -------------------------- =
9.11x[10^(-28)] 9.11

.183315(10^4)=1833.15

The proton mass is about 1833 times an electron mass

Hope this helps!

what would is be in fraction form 1/1833 or 1833/1


.help me thanks much

Answers

(16x^1/6y^-2)^3/2 / (x^-1/6y^6)^3/2

=(4^2)^3/2 (x^1/6)^3/2 (y^-2)^3/2 / (x^-1/6)^3/2(y^6)^3/2
= 4^3   x^1/4 y^-3  / x^-1/4 y ^9
= 64 x^(1/4 +1/4) y^(-3-9)
= 64 x^1/2 y^-12
= 64 x^1/2 / y^12

answer is D.64 x^1/2 / y^12

Find the next two terms in the sequence. 0,1,4,9. . . A.13,18 B,16,25 C.13,17 D.16,23

Answers

A. 13,18 is the answer for this question. Because the next terms added by 3..

Answer:

16 & 25

Step-by-step explanation:

had the same question (;

5x+6y=3x+2 in standard form

Answers


5x + 6y = 3x + 2
5x - 3x + 6y = 2
~~~~~~~~~
2x + 6y = 2

Solve each proportion. Show your work.

a . 2x/7 = 12/14

b. 3/x-1 = 5/7

Answers

2x / 7 = 12 / 14

Start by cross multiplying

28x = 84

Divide both sides by 28

x = 3

b) 3 / x - 1 = 5 / 7

Start by cross multiplying 

21 = 5x - 5

Flip the equation

5x - 5 = 21
    +5    +5

5x = 26

x = 26/5

Which line is perpendicular to 5x + 4y = 8?
A) 4y = –5x + 4
B) 5y = 4x + 5
C)5y = –4x –15
D)4y = 5x + 12

Answers

It would be C) 5y = -4x -15

A box measures 2 cm x 0.09 m x 20 mm. what is its volume in cubic centimeters?

Answers

Final answer:

To find the volume of the box, convert all dimensions to centimeters and then use the formula length x width x height. The volume is 36 cm³.

Explanation:

To calculate the volume of a rectangular box with dimensions in different units, we must first convert all dimensions to the same unit of measure. In this case, we will convert meters and millimeters to centimeters:

0.09 m = 0.09 * 100 cm = 9 cm

20 mm = 20 / 10 cm = 2 cm

Now we can calculate the volume using the formula for the volume of a rectangular box, which is length × width × height:

Volume = 2 cm × 9 cm × 2 cm = 36 cm³

you have a bottle of water with a leak. after 2 seconds there is 28 ounces left in the bottle. after 6 seconds there are 20 ounces left in the bottle. how much water was in the bottle initially

Answers

Im thinking 32 ounces.

Answer:

32!

Step-by-step explanation:

Write an example of a linear equation with one variable and infinitely many solutions.

Answers

Infinitely many solutions means u have coincident lines...the same line

3(x + 5) = 3x + 15...this produces infinitely many solutions because it is the same line.

4x + 3 = 2x + 2x + 3....infinitely many solutions

5x - 1 = 10x - 5x - 1....infinitely many solutions

I gave u a few examples :)

When the smaller of two consecutive integers is added to three three times the​ larger, the result is 23. find the integers?

Answers

consecutive integers are numbers in order, 1,2,3,4,5,6,....
if you make x the smaller number the next number will be (x+1).
x +3(x+1) = 23
x +3x +3 = 23
5x = 23 - 3
5x = 20
x = 20/5
x = 4

the smaller integer is 4 then the next is 5

The value of the integers can be obtained by solving the equation as 5 and 6 respectively.

What is a linear equation?

A linear equation in two variable has the general form as y = ax + by + c, where a, b and c are integers and a, b ≠ 0.

It can be represented as a straight line on a graph.

Suppose the smaller integer be x.

Then, the larger one is x + 1.

As per the question, the following equation can be formed as,

x + 3(x + 1) = 23

⇒ 4x + 3 = 23

⇒ x = 5

Thus, the larger integer is 5 + 1 = 6.

Hence, the integers are obtained as 5 and 6 respectively.

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During a sale at a bookstore, a customer buys one book at full price. The customer is given a 25 percent discount on a second book of equal or less value. If George buys two books that value full prices of $17 and $8, by what percent is the total cost of the two books reduced during the sale?

Answers

Amount paid for the first book is $17.

Amount paid for the second book is 0.75 x 8 = $6

Total amount paid = $17 + $6 = $23

Total full cost of the two books = $17 + $8 = $25

Amount of discount = $25 - $23 = $2

% reduction = [tex] \frac{2}{25} \times100\%=8\%[/tex]

Therefore, the percent of the total cost of the two books reduced during the sale is 8%
8% First, determine what book the discount is applied to. That will be the lower priced book, so the customer saves 25% of the cost of $8, giving 25% * $8 = 0.25 * $8 = $2 So there's a total savings of $2. Now determine what the total price of purchasing both books without the discount. That would be $17 + $8 = $25 And finally, determine what percent of $25 that $2 is, so $2 / $25 = 0.08 = 8%

Solve p−|5|×|−3|=−20

Answers

Answer:

-5

Step-by-step explanation:

The solution of the equation p − |5| × |−3| = − 20 will be negative 5.

What is the solution to the equation?

The distribution of weights to the variables involved that establishes the equilibrium in the calculation is referred to as a result.

The absolute function is also known as the mode function. The value of the absolute function is always positive.

The absolute equation is given below.

p − |5| × |−3| = − 20

Simplify the equation, then we have

p − |5| × |−3| = − 20

p − 5 × 3 = − 20

p − 15 = −20

p = − 5

The solution of the equation p − |5| × |−3| = − 20 will be negative 5.

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What consecutive numbers have a sum of 133?

Answers

Two consecutive integers mean numbers like 2, 3 or -3, -2. Let x represent the first number. the next consecutive number will be x + 1. The equation becomes:  x + (x + 1) = 133. Solve for x: x + (x + 1) = 133 x + x + 1 = 133 2x + 1 = 133 Subtract 1 from both sides: 2x = 132 Divide both sides by 2: x = 66 x + 1 = 67. Solution: The two consecutive numbers adding up to 133 are 66 and 67.
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