Question

consider the expressions (3m + 2n - 6) and (-4 -6m + 7m) Part A what is the sum of the expressions for n = -2 and m = 5? the sum is [ ] part B which expression shown is equivalent to the sum of two original expression written in standard form?1. -3m + 9n - 10 2. 10m - 4n - 10 3. -4mn 4. 9n - 3m + 10

Answer 1

First let us sum the expressions

$\begin{gathered} 3m+2n-6 \\ -6m+7n-4 \\ ----------- \\ -3m+9n-10 \end{gathered}$

Hence, the sum of the expression is

$-3m+9n-10$

Now we put in n = -2 and m = 5 and evaluate the expression to get:

$\begin{gathered} -3(5)+9(-2)-10=-15-18-10 \\ =-43 \end{gathered}$

Hence, the expression evaluated at n = -2 and m = 5 gives

-43 and the answers are:

Part A; - 43

Part B : -3m + 9n - 10