Question

Evaluate the expression when x = 5 and z= 7.

5z +x
Simplify your answer as much as possible.

Answer 1

12

Explanation:

We are given the expression:

`(5z+x^2)/(x)`

and asked to evaluate when x= 5 and z=7. Therefore, we must substitute 5 for x and z for 7.

`((5(7)+(5)^2))/(5)`

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

First, evaluate the exponent.

(5)²= 5*5= 25

`((5(7)+25))/(5)`

Next, multiply 5 and 7.

5*7=35

`((35+25))/(5)`

Next, add 35 and 25.

25+25=60

`(60)/(5)`

Finally, divide 60 by 5.

`12`

The expression (5z+x²)/x when x=5 and z=7 is 12.

Answer 2

40
Reason 5(7)+(5)=40