Answer:
12 inches
Step-by-step explanation:
let length be L
formula for perimeter of rectangle = 2( length + width )
2( L + 9) = 42
2L + 18 = 42
2L = 24
L = 12 inches
a. -7 < |-9|
b. 2 > -2
c, |-5| = |5|
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