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zhenek [66]
3 years ago
6

A random sample of 30 seventh grade students shows that 12 of them own a dog. How many seventh grade students can you predict ow

n a dog if the entire population of seventh graders is 400?
Mathematics
2 answers:
ArbitrLikvidat [17]3 years ago
4 0

Answer:

160

Step-by-step explanation:

If out of 30 7th graders, 12 own a dog then when you have 400 of them, 160 will have a dog as well.

The way I did this was by 400/30: which was 13.3 repeating. I then mutliplied this number by 12, to find the final answer of 160.

otez555 [7]3 years ago
3 0

Answer:

160

Step-by-step explanation:

proportion: 12/30 = 0.4

0.4 × 400

160

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Solve for w.<br> 8(w+2) = 40
AleksAgata [21]

Answer:

  w = 3

Step-by-step explanation:

 8 • (w + 2) -  40  = 0

Pulling out like terms :

3.1     Pull out like factors :

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Equation at the end of step  3  :

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Step  4  :

Equations which are never true :

4.1      Solve :    8   =  0

This equation has no solution.

A a non-zero constant never equals zero.

Solving a Single Variable Equation :

4.2      Solve  :    w-3 = 0

Add  3  to both sides of the equation :

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One solution was found :

                  w = 3

Processing ends successfully

plz mark me as brainliest :)

7 0
3 years ago
What is the equation of the line that passes through the point (-5, 4) and has a
Scilla [17]

Answer:

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Step-by-step explanation:

y=m(x-h)+k

y=-3/5(x+5)+4

5 0
2 years ago
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The problem says that the expression (3x + 5)(5x − 1) <span>represents the area of the floor of the building in square meters. Therefore,  to solve this problem you have to follow the proccedure shown below.

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 2. Then, you have:

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7 0
3 years ago
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