Answer:
x=8, y=4
Look up the 30-60-90 triangle rule
The formula for calculating length is:

We can also write

or

Why it does not matter?
Let's assume we have 2 numbers, a and b.
When we perform a subtraction:

, we get another number

When we perform another subtraction:

, we get a number

When we raise

or

to the power of 2, the result is the same,

.
1985year ->275cell phones->100%
1994year -> x cell phones ->100%+360%
40% • (1994-1985)= 40% • 9= 360%
275 cell phone 100%
X cell phones. 100+360%=460%
x=275•460%/100%
x=12420/100
x=1265
99% sure this is a correct answer
x=275 • 460%/100%
x=12,420/100
x=1265
1994-1985= 9 yrs • 40%= 360%
Yo sup??
By observing the graph we can say that minimum value of Toretto graph occurs at x=-3
whereas the minimum value of OConner graph occurs at x=3 .
In the given figure the minimum value is at x=3
therefore OConner is correct because the vertex is (3,1)
Hope this helps