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4 years ago

HELP PLZ I NEED IT

Mathematics

1 answer:

andrey2020 [161]4 years ago

5 0

Answer: True

Step-by-step explanation:

Let's find proportion at skating rink

Ratio => girls : boys

Ratio => 12 : 14

Ratio => 6 : 7

Let's find proportion at birthday party

Ratio => girls : boys

Ratio => 18 : 21

Ratio => 6 : 7

Both ratios are equal. So, proportional.

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At the beach, Nardia collected triple the number of seashells that Pierre did. Together, they collected 52 seashells. Which equa

MrRa [10]

Answer:

13 seashells

Step-by-step explanation:

p=number of seashells pierre collected

p+3p=52

4p=52

p=13

13 seashells

7 0

3 years ago

Read 2 more answers

If john makes a contribution to a charity fund at school, the average contribution size will increase by 50% reaching $75 per pe

Sonja [21]

Answer:

$Z= 75*6 -250=200$

So then the correct answer is B. $200.

Step-by-step explanation:

Notation

Let X be the average contribution size before John makes his contribution.

Let Y be the total contribution size before John makes his contribution.

Let Z be John's contribution.

We know that for this case $ 75 represent the original average amount before the contribution with 50% increase so we can set up the following equation in order to find the original average amount

$1.5 X = 75$

And solvong for X we got:

$X = \frac{75}{1.5}= 50$

Now we can find the total contribution before the donation with the following proportion:

$\frac{50}{1}= \frac{Y}{5}$

$Y = 250$

And then with the formula of average taking in count the 6 values we can find the size of donation Z like this:

$\frac{Y+Z}{6}= 75$

$\frac{250+Z}{6}= 75$

$Z= 75*6 -250=200$

So then the correct answer is B. $200.

5 0

3 years ago

Dennis is joining an online video game service. He will pay $25.50 to purchase each game plus a one-time foe of $4500 to join

insens350 [35]

Answer:

I am pretty certian it is A

Step-by-step explanation:

You add the x to 25.50 because it is unknown how many games he will buy and add the one time pay of 4,500 to enter the service/company

So it is y= 25.50x + 45

6 0

3 years ago

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If you could put wings on any species of animal, what animal would you choose?

denis-greek [22]

Answer:

Humans

Explanation:

So I can have wings :)

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2 years ago

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ankoles [38]

Step-by-step explanation:

$\cos(300 \degree) \\ \\ = \cos(360 \degree - 60\degree) \\ \\ = \cos( 60\degree) \\ \\ = \frac{1}{2} \\ \\ \huge \orange{ \boxed{ \therefore \: \cos(300 \degree) = \frac{1}{2} }}$

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3 years ago