### Home > CAAC > Chapter 2 > Lesson 2.1.9 > Problem2-90

2-90.
1. Evaluate the expressions below for the given values. Homework Help ✎

1. 6m + 2n2 for m = 7 and n = 3

2. for x = −18

3. for x = 10

4. (k − 3)(k + 2) for k = 1

Substitute the given values for the variables m and n.

6(7) + 2(32)

Simplify the expression.
42 + 18 = 60

60

Substitute −18 for x in the expression. Then simplify.

After substituting 10 for x, the expression becomes:

$(6\cdot10)^{2}-\frac{10}{5}$

Simplify. Be sure to multiply the 6 and 10 before squaring!

Replace each k with 1, and then simplify the expression.

−6