The perimeter of an envelope is 34 inches. It is 11 inches wide. How tall is it?
2 answers:
Just do 34 x 11 I cba to work it out do that
Answer:
6 inches
Step-by-step explanation:
34
11 + 11 + y + y = 34
22 + 2y = 34
22 - 22 + 2y = 34 - 22
2y = 12
2y ÷ 2 = 12 ÷ 2
y = 6
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