3 years ago

Solve 9/10=z/8 . Round to the nearest tenth.

1 answer:

4 0

$\boxed {Question}$
$\frac{9}{10} = \frac{z}{8}$

$\boxed {Cross \ multiply}$
$10z = 8 \times 9$

$\boxed {Evaluate}$
$10z = 72$
$z = 72 \div 10$
$z = 7.2$

$\Longrightarrow \bf \ Answer \ : \ z = 7.2$

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3 years ago

What should be done to x^2 + 15x in order to create a perfect square?

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