keilamurillo5901
20.09.2020 •
Mathematics
Barbara use distributive property to write an expression that is equivalent to 7d+63. Her work is shown below. The greatest common factor is 7 so 7d +63=7(d+63)
What was Barbara’s error?
A-Barbara wrote(d+63) Instead of(63d)
B-Barbara wrote (d+63) Instead of (d+9)
C-Barbara wrote (d-+63) instead of (d+56
D-Barbara wrote (d+63) instead of (10d)
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Ответ:
A= 9(w)
27.5 - 9(2) = 9.5
9.5/2 = 4.75
A=lw
A= 9.5(4.75)
A=42.75
So the area is 42.75!