Question

Which of the following is equivalent to4−(−5∗9−1)÷2+(5)2−7?

Answer 1

-20

Explanation:

Follow the PEDMAS order (from top to bottom):

Parentheses

Exponents

Division and Multiplication

Addition and Subtraction

(-5 × 9 - 1) ÷ 2 + (5)2 - 7

(-45 - 1) ÷ 2 + 10 - 7

-46 ÷ 2 + 10 - 7

-23 + 10 - 7

-13 - 7

-20

Answer 2

-20

Explanation:

=>
`(-5 * 9-1)/2+(5)2-7`

Expanding parenthesis

=>
`(-45-1)/2+10-7`

=>
`-46/2 + 3`

=> -23 + 3

=> -20