The expression a[b+(c−d)] is equivalent to:

A. ab+ac−ad

B. ab+ac+ad

C. ab+ac−d

D. ab+c+d

E. ab+c−d

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step-by-step explanation:

you can first factor out the n to get n(1+5). we know that 1+5 is 6, so we just have 6n.

twenty-six miles over two gallons because the proportion for the original 13 miles to one gallon would be written 13/1 and, doing the same thing to the top and bottom, i multiplied by 2 and got 26/2