Answer:
288
Step-by-step explanation:
answer is in photo above
X=12.5
If the perimeter is 90
90=3x+3x+15
Combine like terms
90=6x+15
Subtracts 15 from both sides
75=6x
Divide by six to get x by itself
12.5=x
Does this help?
Answer:
<em>Answer</em><em> </em><em>is option</em><em> </em><em>c</em>
Step-by-step explanation:

x=3 and y=-6
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1/6 = 0.16 with a line over the 6 because it is repeating