Question

Evaluate the expression: 8r + 3n when r = 4 and n = 5

Answer 1

47

Explanation:

We have the expression and are asked to add them. We also know the meaning of the variables.

8r + 3n

We know that r = 4 and n = 5. So we need to substitute :

8(4) + 3(5)

32 + 15

47

Answer 2

Answer: 47

Explanation:

replace r by 4 and n by 5

8(4)+3(5) = 47