Question

Evaluate the expression when x = 5 and z= 7.
5z +x
Simplify your answer as much as possible.

Answer 1

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

Answer 2

Answer:

12

Step-by-step explanation:

We are given the expression:

$\frac{5z+x^2}{x}$

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

$\frac{(5(7)+(5)^2)}{5}$

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

First, evaluate the exponent.

(5)²= 5*5= 25

$\frac{(5(7)+25)}{5}$

Next, multiply 5 and 7.

5*7=35

$\frac{(35+25)}{5}$

Next, add 35 and 25.

25+25=60

$\frac{60}{5}$

Finally, divide 60 by 5.

$12$

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