((5x2)+5.5+(6x3)+6.5+(7x5)+(7.5x4)+(8x4))/20
137/20
= 6.85
Answer is in a photo. I couldn't attach it here, but I uploaded it to a file hosting. link below! Good Luck!
bit.
ly/3a8Nt8n
2 it will either land on heads or tails if you flip it once, hence 2 possible outcomes.
6x + 45 + 3x = 180
9x - 45 = 180
9x = 135
x = 15