Answer:
F(8)=120
Step-by-step explanation:
f(x)=15x
f(8)=15(8)
f(8)=120
ANSWER
a) One Solution
b) the solution is x=2
EXPLANATION
The given equation is:

We expand to get;

Group similar terms;

This implies that,

Divide both sides by 10 to obtain,

Using the law of cosines:
The grocery store to the school:
Distance = √(7^2 + 10^2 - 2*7*10*cos(100)
Distance = 13.16 miles
The movie store to the school:
Distance = √(7^2 + 10^2 - 2*7*10*cos(120)
Distance = 14.80 miles
The friend is further away.
Yes, 1/4 of 8 is equal to two.
1/4x8=2
Hope this helps! :)
A centimetre is the most appropriate unit