Question

Evaluate each expression below

if a = 32 and b = 150
1) 2a - 100
2) b (-12)
3) 4a + b
4) 9b - 2a
​

Answer 1

Here is your answer.

1) 2a - 100

Substituting the value of a here,

`\rm 2(32) - 100`

`\rm 64 - 100`

`\rm -36`

2) b (-12)

Substituting the value of b here,

`\rm 150 (-12)`

`\rm -1800`

3) 4a + b

Substituting the values of a and b here,

`\rm 4(32) + 150`

`\rm 128 + 150`

`\rm 278`

4) 9b - 2a

Substituting the values of a and b here,

`\rm 9(150) - 2 (32)`

`\rm 1350 - 64`

`\rm 1286`

Answer 2

The answers are:

below in
`\bold{bold}`

Work/explanation:

Plug in 32 for a

`\sf{2(32)-100}`

`\sf{64-100}`

`\bf{-36}`

____________

`\sf{b(-12)}`

`\sf{150\cdot(-12)}`

`\bf{1,800}`

____________

`\sf{4a+b}`

`\sf{4(32)+150}`

`\sf{128+150}`

`\bf{278}`

____________

`\sf{9b-2a}`

`\sf{9(150)-2(32)}`

`\sf{1,350-64}`

`\bf{1,286}`

____________