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ryzh [129]
2 years ago
13

Joel has twice as many CDs as Mariella has. Subtracting 7 from the number of CDs Joel has and dividing by 3 equals the number of

CDs Blake has. If Blake has 25 CDs, how many CDs does Mariella have?
Mathematics
2 answers:
Dima020 [189]2 years ago
5 0
41...
guess, Joel has x CDs.
so,
   \frac{x-7}{3} =25
or,x =82
again,mariella have \frac{82}{2}
                                 =41    
kati45 [8]2 years ago
4 0
Blake has 25 CD's. I know that 75 divided by 3 is 25 but you had to subtract 7 from the number of CD's Joel had before you divided by 3, so you would have to add 7 to the 75 to get the number of CD's Joel has .Then you would multiply 82 and 2 to get Mariella's total CD's which is 164.
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The pool can hold 65.84 ft³ of water

<u>Explanation:</u>

Given:

Shape of pool = octagonal

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Volume, V = ?

We know:

Area of octagon = 2 ( 1 + √2) a²

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\frac{11}{1+\sqrt{2} } = a^2

a² = \frac{11}{2.42}

a² = 4.55

a = 2.132 ft

Side length of the octagon is 2.132 ft

We know:

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Therefore, the pool can hold 65.84 ft³ of water

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Step-by-step explanation:

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Step-by-step explanation:

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