Nadia says that 13 + (-36) is the opposite of 13 + 36. Is Nadia correct?

No

Step-by-step explanation:

13 + (-36) means you are adding 13 more to -36 which is -23 whereas 13 +36 is 39.

Yes

Step-by-step explanation:

This is because the addition in 13 + (-36) will be taken out since the 36 is negative. This means that the addition sign is unecessary and the equation is actually just 13-36 which is the opposite of 13+36.

g

step-by-step explanation:

$25

step-by-step explanation:

25 - 4.50 = 20.5

20.5 / 2 = 10.25

10.25 + 10 = 20.25

20.25 - 12.50 = 7.75

therefore the answer is $25 as shown as the first number.