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3 years ago

Please help me with this, I don't get it!

Mathematics

2 answers:

NNADVOKAT [17]3 years ago

6 0

Make two formulas-

A=2xy
120=16xy

If 16xy = 120 then 2xy will equal 120/8 which equals 15.

A= 15cm cubed

Helen [10]3 years ago

5 0

$V_B=2x\cdot2y\cdot4=16xy=120\ cm^3\\
V_A=x\cdot y\cdot2=2xy\\\\
16xy=120\ cm^3\\
2xy=15\ cm^3=V_A$

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3 years ago

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3 years ago

A collection of dimes is arranged in a triangular array with 17 coins in the base row, 16 in the next, 15 in the next, and so fo

Crazy boy [7]

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153 coins will be there.

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So the total number of coins = (Number of coin in the first row) + (Number of coins in the second row) + (Number of coins in the third row) + ....... + (Number of coins in the last row / seventeenth row)

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3 years ago