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3 years ago

11

A submarine is diving to a total depth of 45 feet. It descends 15% of the total depth in 1 minute. How deep will the submarine b

e after 4 minutes? (5 points)
−6.75 feet −27 feet −13.5 feet −20.25 feet

1 answer:

telo118 [61]3 years ago

8 0

after 4 mins the sub reaches 27 feet

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<em><u>Solution:</u></em>

<em><u>Given inequality is:</u></em>

$-2(z+5)+20>6$

We have to solve the given inequality

$-2\left(z+5\right)+20>6\\\\\mathrm{Subtract\:}20\mathrm{\:from\:both\:sides}\\\\-2\left(z+5\right)+20-20>6-20\\\\\mathrm{Simplify}\\\\-2\left(z+5\right)>-14$

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Whenever we multiply or divide an inequality by a negative number, we must flip the inequality sign

$\left(-2\left(z+5\right)\right)\left(-1\right)$

<em><u>Thus the solution to inequality is:</u></em>

$-2\left(z+5\right)+20>6\quad :\quad \begin{bmatrix}\mathrm{Solution:}\:&\:z$

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