Question

Evaluate 2(a + 3b) for a = -1 and b = 5.
2(a + 3b) =

Answer 1

28

Explanation:

2(a + 3b)

Substitute the values.

2(-1 + 3(5))

Multiply inside parenthesis.

2(-1 + 15)

Add.

2(14)

Multiply.

28

Answer 2

`2(a + 3 b) \\ \\ 2( - 1 + 3 * 5) \\ \\ 2(14) \\ \\ = 28|`