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schepotkina [342]
4 years ago
11

Mia is three years older than twice her sister brooks age. The sum of their ages is less than 30. What is the greatest Brooke co

uld be
Mathematics
2 answers:
Tamiku [17]4 years ago
7 0

I took the test the answer is 8

lyudmila [28]4 years ago
6 0
<span>Let Mia's age be m and her sister's age be x m=2x+3 2x+3+x=less than 30 For greatest age we need to take largest number. 3x+3=29 x=26/3 But the options are all in whole numbers, so if 3x+3=27 then x =8</span>
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If the volume of a cube is 729cm^3, what is the surfface area.<br><br> Thanks!!
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Answer:

486cm^2

Step-by-step explanation:

cube volume: 729cm^3

cube faces count: 6

How you calculate square area:

s(cm) * s(cm) or just s^2(cm^2)

s = side length

If you want to find out the side length of a cube by its volume. Then simply just remove the ^3 by taking the cubic root (also written ^(1/3))

729^(1/3) = 9

then just calculate the area like i showed earlier:

(9cm)^2 = 81cm^2

But that is only one side of a cube's 6 sides, so multiply by 6:

81cm^2 * 6 = 486cm^2

Hope i could help :D

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