Question

What is the value of the expression below when y = 8 and z = 9? 5y – 2z

Answer 1

Answer:

$\boxed {\tt 22}$

Step-by-step explanation:

We are given the expression:

$5y-2z$

We want to find the value of the expression when y=8 and z=9. Therefore, we must substitute 8 in for y and 9 in for z.

$5(8)-2(9)$

Solve according to PEMDAS: Parentheses, Exponents, Multiplication, Division, Addition, Subtraction.

Multiply 5 and 8.

$40-2(9)$

Multiply 2 and 9.

$40-18$

Subtract 18 from 40.

$22$

The value of the expression 5y-2z at y=8 and z=9 is 22.