Question

Find the sum of 3/4 and 9/10. Then multiply by -5/4. What is the product?

Answer 1

Sum:

`= (3)/(4) + (9)/(10) \\ \\ = (30 + 36)/(40) = (66)/(40) \\ \\ sum = (33)/(20)`

Product:

`= (33)/(20) * - (5)/(4) \\ \\ = - (33 * 5)/(20 * 4) \\ \\ = - (165)/(80) \\ \\ { \boxed{ \boxed{product = -(33)/(16) = -2 (1)/(16) }}}`