Final answer:
a) m = 9/2n + 7/2p. To solve the equation 9 = 2mn + 7mp for m, factor out m to get m(2n + 7p) = 9 and then divide by (2n + 7p) to isolate m. The final expression is m = 9 / (2n + 7p).
Step-by-step explanation:
The question asks to solve the equation 9 = 2mn + 7mp for m. To isolate m, we must factor it out on the right side of the equation.
First, the equation is transformed to m(2n + 7p) = 9.
Next, to solve for m, divide both sides by the expression in parentheses: m = 9 / (2n + 7p). This gives us the value of m in terms of n and p. The numerator is 9 while the denominator is (2n + 7p).
So the correct solution for m is m = 9 / (2n + 7p), which corresponds to option a) m = 9/2n + 7/2p.