Aliaa got a mark of 60 in her first 4 tests, so her total mark is 60 x 4 = 240. On her fifth test, she got a mark of 80.
So her average is:
(240+80)/5 = 320/5 = 64
Her avg is 64 (c).
Answer:277
Step-by-step explanation:
Multiply -8 on both sides

n + 2 = 32 Subtract 2 on both sides
n + 2 - 2 = 32 - 2
n = 30
Answer:
3.6
Step-by-step explanation:
d = sqrt(3^2+2^2) = sqrt(13) = 3.6