Question

How do you evaluate the expression `8b+4d` if b=9, d=5?

Answer 1

Plug in each value to its corresponding variable.

`8color(blue)b + 4color(red)d`; `b = color(blue)9, d = color(red)5`

`8(color(blue)9) + 4(color(red)5)`

Now simplify.

`color(blue)72 + color(red) 20`

Add.

`color(green)92`