If a^2-b^2=648 and (a-b)=24, what is the value of (a+b) f.21 g.24 h.25 j.26 k.27

K.27. This is because if you were to factor a^2-b^2, you get (a+b)(a-b)=648. If you substitute a-b for 24, it would lead the equation to be 24(a+b)=648. Divide 24 from both sides to get the answer.

e.

step-by-step explanation:

because there are always 10 numbers in a phone number.