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3 years ago

15

The ratio of 7th grade students to 8th students in a soccer league is 17:23. If there are 200 students in all, how many are in t

he 7th.

1 answer:

Katarina [22]3 years ago

8 0

Answer:

<h2>35</h2>

Step-by-step explanation:

<h2>17:23=17+23=40</h2><h2><u>7</u>×200</h2><h2>40</h2><h2><u>7</u>×20</h2><h2>4</h2><h2>7×5=35</h2>

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Select all the expressions that are equivalent to −5/6 / -1/3

Sindrei [870]

Step-by-step explanation:

We need to find an expression for $\dfrac{\dfrac{-5}{6}}{\dfrac{-1}{3}}$ .

We can solve it as follows.

We know that,

$\dfrac{\dfrac{a}{b}}{\dfrac{c}{d}}=\dfrac{a}{b}\times \dfrac{d}{c}$

So,

$\dfrac{\dfrac{-5}{6}}{\dfrac{-1}{3}}=\dfrac{-5}{6}\times -3\\\\=\dfrac{5}{2}$

or

$=2\dfrac{1}{2}$

Hence, this is the required solution.

3 0

3 years ago

A chemist is using 351 millimeters of a solution of acid and water. If 18.2% of the solution is acid, how many milliliters of ac

Zolol [24]

Answer:

The % of of acid in solution = 63.88 ml

Step-by-step explanation:

The solution of acid and water = 351 milliliters

The % of of acid in solution = 18.2% of 351 ml

Or, The % of of acid in solution = $\frac{18.2}{100}$ × 351 ml

Or, The % of of acid in solution = 63.882 ml

Hence ,The % of of acid in solution = 63.88 ml Answer

3 0

3 years ago

Suppose the linear regression line y = 3.27x + 1.52 predicts the weight of a large dog, in pounds, x weeks after it is born. Abo

andreyandreev [35.5K]

Answer:

y=21.14

Step-by-step explanation:

x=6 because after 6 weeks

y= 3.27(6)+ 1.52

y=19.62 + 1.52

y=21.14

4 0

4 years ago

What’s the correct answer for this?

slava [35]

Answer:

1/4

Step-by-step explanation:

Let's denote the probabilities as following:

Probability that a teenager has a sister:

P(A) = 12/28

Probability that a teenager has a brother:

P(B) = 7/28

Probability that a teenager has both a sister and a brother:

P(A⋂B) = 3/28

Probability that a selected teenager has a sister also has a brother, or in other words, he/she has a brother, given he/she had a sister:

P(B|A)

Let's apply the formula of conditional probability to work out P(B|A)

P(B|A) = P(A⋂B)/P(A) = (3/28)/(12/28) = (3*28)/(12*28) = 3/12 = 1/4

=> Option C is correct

Hope this helps!

7 0

3 years ago

How Many Solutions?<br> 3x - 7 = 3(x - 3) + 2<br> No Solution<br> One Solution<br> Infinite Solution

prisoha [69]

Answer:

Infinite Solutions

Step-by-step explanation:

3x-7=3x(x-3)+2

3x-7=3x-9+2 - Distributive Property

3x-7=3x-7 - adding the right side together

3 0

3 years ago