Amy makes a rectangular poster with an area of 21+28m square inches. The width of the poster is 7 inches as shown in the followi
ng diagram. What is the length of the poster?
1 answer:
You could use simple factoring to solve this. You would factor out a 7 and then have
7(3+4m) = A
l x w = A
w= 3 +4m
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C: 4 and 5, because 5x4=20 hope it helps
