Answer:
a
.Step-by-step explanation:
Answer:
A. x=3
Step-by-step explanation:
Solve for x:
4x+10+3x=40-3x
7x+10=40-3x
+3x +3x
10x+10=40
-10 -10
10x=30
/10 /10
x=3
The expression for the perimeter is P = 12x - 16
<h3>How to write an expression for the perimeter?</h3>
The given parameters are
Length = 3x + 1
Width = 3x - 9
The perimeter is calculated as
P = 2 * (Width + Length)
So, we have
P = 2 * (3x + 1 + 3x - 9)
Evaluate
P = 2* (6x - 8)
Expand
P = 12x - 16
Hence, the expression for the perimeter is P = 12x - 16
Read more about perimeter at:
brainly.com/question/19819849
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