SOLUTION: the length of a rectangle is fixed at 14 cm. what widths will make the perimeter greater than 70 cm.

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Question 462875: the length of a rectangle is fixed at 14 cm. what widths will make the perimeter greater than 70 cm.
Found 2 solutions by MathLover1, rfer:
Answer by MathLover1(20849) About Me  (Show Source):
You can put this solution on YOUR website!
given:
the length of a rectangle is fixed at L=14cm.

find:
what widths W will make the perimeter greater than P%3E70cm

P=2%28L%2BW%29
so you need
2%28L%2BW%29%3E70cm

2%2814+cm%2BW%29%3E70cm

28cm%2B2W%3E70cm
2W%3E70cm-28cm
2W%3E42cm
W%3E42cm%2F2
W%3E21cm




Answer by rfer(16322) About Me  (Show Source):
You can put this solution on YOUR website!
2*14+2x=70
28+2x=70
2x=42
x=11
answer
x > 11