Question

(18 - ab) + 4b if a = -2 and b = -5 Evaluate each expression given the variable replacement

Answer 1

Recall that to evaluate an expression at a given value(s), we replace the variable(s) with the given value(s).

Substituting a=-2, and b=-5 in the given expression, we get:

$(18-(-2)(-5))+4(-5)\text{.}$

Simplifying the above result, we get:

$(18-(10))-20=8-20=-12.$

Answer:

$-12.$