Use the cosine rule.
c=AB=7
b=AC=8
a=BC=3
a^2=b^2+c^2-2bc(cos(A))
=>
cos(A)=(b^2+c^2-a^2)/(2bc)
=(7^2+8^2-3^2)/(2*7*8)
=13/14
=0.9286
Answer:
baxter's saving account
Step-by-step explanation:
Answer:

Step-by-step explanation:
Given



Required
Find y

So, the expression becomes

Collect like terms


Collect like terms


Make y the subject


I think it could be 73. Because if you check what it the question says 73 fits them.
Answer: The two companies never charge the same amount to rent a bicycle for the same number of hours.