Evaluate the expression `3b-ac` when `a\ =\ 2`, `b\ =3`, and `c=-1.5`.

Answer 1

To evaluate the expression `3b-ac` when `a = 2`, `b = 3`, and `c = -1.5`, we substitute the given values into the expression.

`3b - ac` becomes `3(3) - 2(2)(-1.5)`.

Next, we simplify the expression inside the brackets:

`= 9 - 2(2)(-1.5)`

`= 9 - 2(-3)`

`= 9 + 6`

`= 15`

Therefore, the value of the expression `3b-ac` when `a = 2`, `b = 3`, and `c = -1.5` is 15.