Question

How do you evaluate the expression r(p+3) + q(p-1),for p=7,q=4,r=3?

Answer 1

Replace each variable with its value and evaluate arithmetically to get `54`

Explanation:

Given `color(red)(p=7)`, `color(blue)(q=4)`, and `color(green)(r=3)`

`color(green)(r)(color(red)(p)+3)+color(blue)(q)(color(red)(p)-1)`
`color(white)("XXX")`becomes
`color(green)(3)(color(red)(7)+3)+color(blue)(4)(color(red)(7)-1)`

`=3(10)+4(6)`

`=30+24`

`=54`