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

2-90.

Substitute the given values for the variables *m* and *n*.

6(7) + 2(3^{2})

Simplify the expression.

42 + 18 = 60

60

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

After substituting 10 for *x*, the expression becomes:

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

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

−6