715 x 3 = 2145 cookies are to be baked
Answer:
fourth number is 9
Step-by-step explanation:
let 'x' equal the fourth number
(5+7+7+x)/4 = 7
cross-multiply to get:
19 + x = 28
x = 9
Hope this helps.
The answer to your question is the third option
(-1,-2)
apex
