Answer:
70
Step-by-step explanation:
If you use Pascal's Triangle, you will need 9 lines, since there are 9 terms in a binomial raised to the 8th power. Those 9 terms are:
1, 8, 28, 56, 70, 56, 28, 8, 1
The first expansion through the one we need are below (I hope you know how to use Pascal's Triangle!):

Answer:
3
Step-by-step explanation:
3-4-5 the 3 would be it do to the range is 4-5
We know that AC=8x-20 and B is the mid-point of AC
⇒ AB = BC = 
⇒ BC =
⇒ BC = 4x-10
Answer:
88
Step-by-step explanation:
Answer:
12.5 km.
Step-by-step explanation:
Distance = average speed x time = 25 km/h x 0.5 h = 12.5 km.
if wrong, sorry
(but most likely right)