Marion Middle School has 600 students. Mike surveys a random sample 7 of 30 students and finds that 7 of them play a musical instrument. How many students at the school are likely to play a musical instrument?

Please explain how as well.

Answers

Answer 1
So if 7/30 students plays an instrument then you'll need to set up an equation for this. The equation you'd use would be:
7/30 = x/600
Then, cross multiply to get:
30x = 4200
Lastly, divide each side by 30 and:
x = 140 students play a musical instrument

Hope this helps!! :)
Answer 2
Do a proportion
7/30=x/600
1. Cross multiply
7x600=4200
30•X= 30x
30x=4200
Divide each side with the number with the variable.
30x/30=4200/30
X=140

Related Questions

which statement about the equation is true?

x + 2 = x + 4

a. one solution
b. no solution
c. multiple solutions

Answers

C because you got to find the like term term

Answer:

The correct option is b) no solution.

Step-by-step explanation:

Consider the provided equation,

[tex]x + 2 = x + 4[/tex]

We need to find the solution of the above equation.

Subtract x from both the sides as shown.

[tex]x-x+2=x-x+4[/tex]

[tex]2=4[/tex]

Which is false.

As 2 is not equal to 4.

Hence, the provided equation has no solution.

Thus, the correct option is b) no solution.

Express the following number using expanded form, unit form, and word form: 625.25

Answers

The answer is tents ,ones,ones

A fish market bought two swordfish at a rate of $13 per pound the cost of the larger fish was 3 times as great as the cost of the smaller fish the total cost of the two fish was $3,952 how much did each fish weigh

Answers

3952/13 is 304 pounds at the cost of 13 dollars each fish is 152 pounds

what is 9x-7=-7 in two step show your work

Answers

9x-7 = -7

step 1 = add 7 to each side

9x = 0

step 2 divide both sides by 9

x = 0/9 = 0

What is the domain and range of the function shown in the graph?

Answers

The domain is the set of all x values which are defined (appear on the graph) of the function. In this system, all values from negative infinity to 0, but not including zero, and all values above zero, through positive infinity, are valid. We can write this in set builder notation as x: (-∞,0)∪(0,∞).

The range is the set of all y values which are defined in the function. Like the domain, the range of this function contains all value from negative infinity to positive infinity except zero. Same notation: y: : (-∞,0)∪(0,∞).


how many even numbers are between 32 and 60. (not including 32 & 60)

Answers

34, 36, 38, 40, 42, 44, 46, 48, 50, 52, 54, 56, 58

13.

Hope this helps!
34,36,38,40,42,44,46,48,50,52,54,56,58. There are 13 even numbers.

I hope this helped

order greatest to least for the following 2.007, 2.714, 2.09, 2.97

Answers

2007 209 2714 297 is that order

the table shows how far four students walked in 5 minutes. how far did they walk together. 3/4, 1/2,2/3,3/4.

Answers

They all walked 32/12 or 2 2/3
Final answer:

To find the total distance walked by the four students, add their individual distances together.

Explanation:

To find the total distance walked together, you need to add up the distances each student walked. The distances given are represented as fractions. To add fractions, first make sure the denominators are the same. In this case, the denominators are already the same, so you can add the numerators together. So, 3/4 + 1/2 + 2/3 + 3/4 = 15/12.

Simplify the resulting fraction by finding the greatest common divisor of the numerator and the denominator, which is 3. Divide both the numerator and denominator by 3 to get the final answer: 15/12 ÷ 3/3 = 5/4.

Therefore, the students walked a total distance of 5/4 or 1 1/4.

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a backpack manufacturer produces an internal frame pack and an one hour and let y represent the number of external frame packs produced in one hour.Then the inequalities x+3y<=18,2x+y<=16,x>=0 and y>=0 describe the constraints for manufacturing both packs.Use the profit function f(x,y)=50x+80y and the constraints given to determine the maximum profit for manufacturing both packpacks for the given constraints

Answers

The maximum, 1280, occurs at (0,16).

What is an expression?

Mathematical expression is defined as the collection of the numbers variables and functions by using operations like addition, subtraction, multiplication, and division.

Given that;

The inequality is,

x + 3 < 18

x < 15

And,

2x + y < 16

y < - 2x + 16

Now, you can see the constraint, x + 3 < 18 doesn't even enter into calculating the feasible region because the constraint, 2x + y < 16 really identifies the region.

Now, We can Check the value of the function at the three vertices as:

At (0,0):

f(x, y) = 50x + 80y = 0

At (8, 0);

f(x, y)=50x+80y

f (8, 0) = 400

At (0, 16);

f(x, y ) = 50x+80y

f (0, 16) = 1280

Thus,  The maximum, 1280, occurs at (0,16).

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I need some help plz!
Enter in the missing numbers to create equivalent ratios.
2:5
Blank:10
6: Blank
Blank:25

Answers

2:5
4:10
6:15
        Because they give you thee base ratio, you can see that 5 x 2 = 10
so 2 x 2 =  10 which makes an equivalent ratio. 

Write in exponent form and word form. 10x10x10x10x10x10

Answers

10x10x10x10x10x10 = 10^6

Hope this helps! :)
10 to the 6th power=word form


Which property of equality would you use to solve the equation 14x=56

Answers

The answer is The Multiplication or Division Principle of Equality. It states that if you multiply or divide both sides of an equation by an expression, the resulting the equation will be equivalent to the original equation.

14x = 56
x = 4 <-- Divide both sides by 14

So, x is equal to 4.

The division property of equality is used to solve equality 14x = 56 where x = 4.

What is equality?

In mathematics, equality is a relationship between two quantities or, more generally two mathematical expressions, asserting that the quantities have the same value, or that the expressions represent the same mathematical object.

The given equality is,

14x = 56

Using division property of equality,divide both side by 14

14x/14 = 56/14

Solving we get,

x = 4

Thus, the division property of equality is used to solve equality 14x = 56 where x = 4.

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One-eighth of the 32 students in the class went abroad for fall break. How many students went abroad?

Answers

divide 32 by 8

32/8 = 4 students went abroad

What statement makes the open sentence 1.2 = 3x true?
1.) x = 0.4
2.) x = 1.8
3.) x = 2.5
4.) x = 3.6

I am very confused XD
Also if you could tell me how you got the answer I would appreciate it :)



Answers

x=0.4 all i did was multiply all of the choices by three and i picked the one that equals 1.2

In the recent year, 26.6% of all registered doctors were female. If there were 54,200 female registered doctors that year, what was the total number of registered doctors? Round the answer to the nearest whole number.

Answers

There would be 203,759 total registered doctors that year.

a beauty salon buys bottles of styling gel for 4.50 per bottle and marks up the price by 40%. for what price does the salon sell each bottle

Answers

First of all you need to know what is the 40% of 4.50 you multiply
4.5 x 0.4 = 1.8
1.8 + 4.5 = 6.3 is your answer

The price the salon sells each bottle is 6.3 if a beauty salon buys bottles of styling gel for 4.50 per bottle and marks up the price by 40%.

What is percentage?

It's the ratio of two integers stated as a fraction of a hundred parts. It is a metric for comparing two sets of data, and it is expressed as a percentage using the percent symbol.

It is given that:

A beauty salon buys bottles of styling gel for 4.50 per bottle and marks up the price by 40%.

From the question:

= 40% of 4.50

= 1.8

= 1.8 + 4.5 = 6.3

Thus, the price the salon sells each bottle is 6.3 if a beauty salon buys bottles of styling gel for 4.50 per bottle and marks up the price by 40%.

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Your teacher divides your class into two groups and then randomly chooses a leader for each group the probability that you are chosen to be a leader is 1÷12 the probability that both you and your best friend are choosing is 1÷132 is your best friend in your group explain

Answers

Answer:

1 DIVIDED BY 12 IS 1 SO SAME THING WITH 1 DIVIDED 132 IS 132 SO ADD THEM AND YOU SHOULD GET YOUR ANSWER PS i dont know the answer

Step-by-step explanation:

No, my best friend is not in my group.

Let's break down the probabilities to determine if your best friend is in your group. The probability that you are chosen as a leader is [tex]\frac{1}{12}[/tex]. Let’s denote your best friend by BF. Given that the probability that both you and best friend are chosen as leaders is [tex]\frac{1}{132}[/tex], we need to check if BF is in your group.If your best friend is in your group, then there is only one leader to be chosen from this group. Hence, the probability that you and your best friend are chosen from the same group would be calculated by selecting the group leader and then the remaining leader from the other group.In this scenario, the probability of you and your best friend being chosen as leaders would typically depend on the group size and configuration.Since the probability of you both being chosen is [tex]\frac{1}{132}[/tex], this indicates that you are more likely not in the same group. If BF were in the same group, the probability would be calculated based on how likely both members are to be from the same group, considering the overall class size and number of groups.Thus, given the probability details, we can conclude that your best friend is not in the same group as you.

what is the answer to a/164363 -10 = 10

Answers

a/164363-10=10
a/164363=10+10
a/164363=20
a=20*164363
a=3287260
Hope this helps

when multiplying and subtracting fractions ... 5/6-3/4

Answers

multiplying: 5/6 x 3/4 = 15/24
do not need common denominators

subtracting: 5/6 - 3/4 = 20/24 - 18/24 = 2/24
need a common denominator

How do I solve this question?

Answers

Before attempting to solve this question, we must first know three things.

1. A straight line has a measure of 180 degrees.

2. When two angles add up to 180 degrees, those angles are called supplementary.

3. The interior angles of a triangle add up to 180 degrees.

We can see ∠ECT = 180 degrees.

∠DCT is supplementary to ∠DCE.

∠DCT = 140 degreees
∠DCE = x degrees

x + 140 = 180

Solve for x.

x + 140 = 180
x = 40 <-- Subtract 140 from each side

∠DCE = 40 degrees

We know the two interior angles of ΔDEC.

45 + 40 + x = 180

Solve for x.

45 + 40 + x = 180
85 + x = 180 <-- Combine like terms
x = 95

So, the missing angle is equal to 95 degrees.

Shawn wants to model the number 13,450 using base ten blocks how many large cubes flats and longs does he need model the number

Answers

1 small cube = 1 small cube
   
10 small cubes = 1 long
   
10 longs (or 100 small cubes) = 1 flat
   
100 flats (or 1000 small cubes) = 1 large cube
           
13,450 needs to be divided into groups (by number). Separate by thousands, hundreds, and tens. There are 13 thousands in 13,000. That leaves 450 remaining. 450 is 4 hundreds and 5 tens. 1 large cube is 1000 small cubes. 1000 * 13 = 13,000. You need 13 cubes, with a total of 450 remaining. 100 small cubes is 1 flat. 100 * 4 = 400. You need 4 flats, with 50 remaining. 10 small cubes are 1 long. 10 * 5 = 50. You need 13 cubes, 4 flats, and 5 longs.

A line contains the points  (−26, −37)  and  (−32, −61) . What is the slope of the line in simplified form?
I got -4 for my answer, but I don't know if this is right. Please help!!XD

Answers

Using y2-y1/x2-x1      m=24/6   so the slope is +4

The slope of the line is "4".

Given:

[tex](x_1 , y_1 )= (-26, -37)[/tex][tex](x_2, y_2) = (-32,-61)[/tex]

As we know the formula for finding the slope will be:

→ [tex]m = \frac{y_2-y_1}{x_2-x_1}[/tex]

By substituting the values, we get

→     [tex]= \frac{-61-(-37)}{-32-(-26)}[/tex]

→     [tex]= \frac{-61+37}{-32+26}[/tex]

→     [tex]= \frac{-24}{-6}[/tex]

→     [tex]=4[/tex]

Thus the answer above is right.  

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What is 0.04 divided by 10

Answers

0.04 / 10 = 0.004 <===
0.04 divided  by 10 = 0.004

Hope this helps!

What transformation is represented by the rule (x, y)→(−y, x)?

A. reflection across the x axis

B. rotation of 90 degrees clockwise about the origin

C. reflection across the y axis

D. rotation of 180 degrees about the origin

Answers

C. reflection of the y axis, the y turned from a positive to a negative y while x is still the same


Hope I helped you:)

Answer:

The answer is D, an 180 rotation about the origin

Step-by-step explanation:

I just did the test and got it right :)

25 exponent 9 is grewter then (5 exponent 4) and a exponent 2 next to the parentheses

Answers

remember
[tex](x^m)^n=x^{mn}[/tex]


so let's rewrite them

25=5^2
so
[tex]25^9>(5^4)^2[/tex]
[tex](5^2)^9>5^{4*2}[/tex]
[tex]5^{2*9}>5^8[/tex]
[tex]5^{18}>5^8[/tex]
yep, that's definitely true

Dori and Malory are tracking their steps taken as a health goal. Dori leaves her house at 12:00 p.m. and walks at 50 steps per minute. Malory leaves her house at 12:20 p.m. and walks at 90 steps per minute. At what time will Malory's steps catch up to Dori's steps?

Answers

Let n = minutes since 12:00 pm when Malory catches up to Dori.

Dori travels
(50 steps/min)*(n minutes) = 50n steps

Malory begins walking at 12:20 pm, so she walks for (n - 20) minutes. She travels
(90 steps/min)*(n - 20  min) = 90n - 1800 steps

Equate the steps traveled by Dori and Malory.
90n - 1800 = 50n
40n = 1800
n = 45 min

The time corresponding to n = 45 min is 12:45 pm

Answer: 12:45 pm

6,700 rounded to nearest thousand

Answers

7,000

We know this because 7 rounds up!

Hope this helped!

Which of the following shows the factors of 2y^2 - 2y - 4? Select one of the options below as your answer: A. (2y - 4)(y - 1) B. (2y - 4)(y + 1) C. (2y - 2)(y - 2) D. (2y - 2)(y + 2)

Answers

If you multiply out the answers, which is easier, then you can find the correct answer.

The factors need to multiply together to create the original problem, so it's just a matter of plug and chug.

The answer is B.
Yes, B.) is correct

Cara likes candles. She also likes mathematics and was thinking about using algebra to answer a question that she had about three of her candles. Her taller candle is 16 centimeters tall. Each hour it burns makes the candle lose 2.5 centimeters in height. Her short candle is 12 centimeters tall and loses 1.5 centimeters in height for each hour that it burns. Cara’s middle candle is 15 cm tall and burns at a rate of 2.25 centimeters in height for each hour that it burns. When will all candles be the 6cm tall?

Answers

All candles will be at 6cm after 4 hours have gone by.

All three candles will be 6 centimeters tall after 4 hours of burning.

To determine when all three candles will be 6 centimeters tall, we can set up equations for each candle and solve for the time it takes to reach the desired height.

For the taller candle, we can set up the equation:

16 - 2.5t = 6,

where t represents the number of hours.

Similarly, for the shorter candle:

12 - 1.5t = 6.

And for the middle candle:

15 - 2.25t = 6.

Simplifying each equation, we have:

-2.5t = -10,

-1.5t = -6,

-2.25t = -9.

Solving for t in each equation, we find:

t = 4 for the taller candle,

t = 4 for the shorter candle,

t = 4 for the middle candle.

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2m-2x=x+n. solve for x.

Answers

Solve for x by simplifying both sides of the equation then isolating the variable and you should get
x=2m/3 - n/3 
Hope this helped please give brainliest

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