Please help quick! Subtracting a number is the same as adding its opposite.
Use this understanding to complete each of the equations below.

Enter numbers to evaluate −5−(−7).

‐5 –(‐7)= ‐5 + _

= _

Enter numbers to evaluate −5−7.

‐5− 7 = ‐5 + _

= _

According to a study conducted in 2015, 18% of shoppers said that they prefer to buy generic instead of name-brand products. suppose that in a recent sample of 1500 shoppers, 315 stated that they prefer to buy generic instead of name-brand products. at a 5% significance level, can you conclude that the proportion of all shoppers who currently prefer to buy generic instead of name-brand products is higher than .18? use both the p-value and the critical-value approaches.