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ivolga24 [154]
3 years ago
10

A=2b^3-1 what's the value of b if a is 13

Mathematics
2 answers:
skelet666 [1.2K]3 years ago
5 0
\sf~A=2b^3-1

Plug in A = 13

\sf~13=2b^3-1

Add 1 to both sides:

\sf~14=2b^3

Divide 2 to both sides:

\sf~7=b^3

Find the cube root of both sides:

\sf~b=\sqrt[3]{7}

\sf~b\approx~1.91
vlabodo [156]3 years ago
3 0
A = 2b³ - 1
13 = 2b³ - 1
<u>+ 1         + 1</u>
<u>14</u> = <u>2b³
</u> 2       2<u>
</u> 7 = b³
∛(7) = b
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