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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)

Respuesta :

Answer:

Step-by-step explanation:

i think its b

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Answer:

B-Barbara wrote (d+63) Instead of (d+9)

Step-by-step explanation:

Since the greatest common factor is 7 it simply mean 7 is divisor of the expression 7d +63 and not just a divisor of 7d.

=(7d+63)/7

= (d + 9)

Expression 7(d+63) = (7*d + 7*63) = 7d + 441 which is not equal to 7d +63

So Barbara should have writen 7d +63 = 7(d+9) instead.

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