Question

I really need to know the answer

Answer 1

We must follow order of operations rules (PEMDAS).

Thus, mult. and div. must be carried out before addn. and subtrn.

Calculate the quotient of (-2/5) and (4/5). In other words, divide (4/5) into (-2/5). Invert (4/5) and multiply:

(-2/5)(5/4) = -1/2

Then we have, in place of the original expression, the following expression:

-3/4 - 1/2 + (2 1/2).

Rewriting 2 1/2 as an improper fraction and elim. the parentheses yields:

-3/4 - 2/4 + 5/2, or -3/4 - 2/4 + 10/4, since the LCD is 4.

This yields 5/4 (answer)