Question

Needing help on this asap

Answer 1

average= 9.625
average is when you add up all the numbers and divide by how many there are..
x,21,27,21,16,-2,-9,9
(x+21+27+21+16+-2+-9+9)/8=9.625
×8 both sides
x+21+27+21+16+-2+-9+9=77
x+83=77
-83 both sides
x= -6 degrees