In the solution, 3b + 9c = 3(b + 3). What should be done to make it CORRECT? A. Change the common monomial factor of the given.

B. The second term of the binomial factor should be 3c instead of 3.

C. The first term of the binomial factor should be 3b instead of b.

D. Change the sign of the second factor.

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The second term of the binomial factor should be 3c instead of 3.

Step-by-step explanation:

Distributive property:

a*b + a*c = a*(b +c)

3b + 9c = 3*b + 3* 3 *c = 3*(b + 3c)

what is the question? i am guessing you are looking for the area.

to find an area, you have to do length x width.

in this case, it would be 12 ft x 4 ft = 48 sq. ft