Question

Evaluate -4a + 8z if a=8 and z=3.​

Answer 1

use the substitution method

-4a+8z

-4(8)+8(3)

-32+24 Negative number times (*) and positive number=negative number

=-8

Answer is -8

Answer 2

-8

Explanation:

-4a + 8z

= -4(8)+8(3)

= -32+24

= -8