Question

Evaluate the expression when x= -5.2 and y = –6.8.
4x-7y

Answer 1

Explanation:

Substitute variables with given values

Minus sign becomes plus sign if a negative is multiplied by a negative or a negative is put next to a negative number.

4x-7y=4(-5.2)-7(-6.8)

-20.8+47.6=26.8