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2 years ago

14

In a seventh grade class, 14 out of 30 students are boys. In simplest terms, what is the ratio of the number of boys to the numb

er of girls in this grade?
A. 7:15
B. 15:7
C. 7:8
D. 8:15

1 answer:

Triss [41]2 years ago

8 0

${Hello,\;There!}$

They already give you the number of boys {14}, so all you need to do is subtract 30 - 14 which will give you the ratio of girls.

It does this because 14 takes up $\frac{14}{30}$ of the seventh grade class.

$\text{30 - 14 = 16}$

So your answer is going to be 14:16 un-simplified.

However, since they ask you to put it in the simplest terms, we are going to simplify $\frac{14}{16}.$

You can do this by dividing both numbers by 2.

= $\frac{14 \div 2}{16 \div 2}=\frac{7}{8}$

$\bold{So\;your\;answer\;is\;going\;to\;be}$

$= \frac{7}{8}$ or $\text{7:8}$

$\rule{300}{1.0}$

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3 years ago

Mary walks 4 miles north and then turns and walks 5 miles west. How far is she from her original starting point?

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Answer: 6.403 miles; or, write as: 6.403 mi. .
__________________________________________________
Explanation:
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5
--------------------------------------------
`   right angle   |_ |
` (right triangle ) |
   `    | 4
`       |
`
"c" ` \
(hypotenuse)     Starting point

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→ a² + b² = c² ; Solve for "c" ; our answer (in "miles"; or, "mi.") ;
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3 years ago

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<u>Linear Modeling</u>

Some events can be modeled as linear functions. If we are in a situation where a linear model is suitable, then we need two sample points to make the model and predict unknown behaviors.

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$f(x)=mx+b$

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The question states the charge for renting a car is a function of the mileage. It also provides two points from which we can build our model. Let's set the following variables:

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3 years ago

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3 years ago

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8 0

3 years ago