Answer:
x = -30
Step-by-step explanation:
subtract 7 from both sides ( 7+2/5x -7, -5-7 )
simplify ( 2/5x = 12 )
multiply both sides by 5 ( 2/5x times 5 = 5 (-12) )
simplify ( 2x = -60 )
divide both sides by 2 ( 2x / 2, -60 / 2 )
x = -30
Answer:C
Step-by-step explanation:
Evaluate -(5)^2. Note that Order of Operations rules (PEMDAS) require that we perform exponentiation before multiplication.
Therefore, we evaluate 5^2 first, obtaining 25, and after that multiply this result by -1.
-(5)^2 = -25
Hi!
<h3>Let's set up a proportion and cross multiply to solve. </h3>

<h3>Solve for w</h3>
2 * 12 = 24
24/3 = 8
<u>
</u>
<h3>To find the perimeter of the floor, use this equation</h3>
<em>(l = length</em>
<em>w = width </em>
<em>p = perimeter)</em>
l + l + w + w = p
<u>12 + 12 + 8 + 8 = 40</u>
<h2>The perimeter of the floor is 40 meters. </h2>
Hope this helps! :)
-Peredhel