Using the Pythagorean theorem we can solve for x.
x^2 + 6^2 = 10^2
Simplify:
x^2 + 36 = 100
Subtract 36 from both sides:
x^2 = 64
x = √64
x = 8
15 mph 5280 ft 1 hr
----------- * ------------- * ------------ = 1320 feet per min.
1 1 mile 60 min
You might want to make use of the fact that 60 mph = 88 ft/sec.
Because division would only make a smaller number, unless of negitives
The formula for a vertex form equation is

in which (h,k) represents the vertex
Your equation is in vertex form, if you mpve the -7 to the other side you will get

because you have to add 7 to both sides
based on the equation,
h=10
k=7
(h,k)=(10,7)
your vertex is (10,7)
Kay is correct because if you take 3 4s and add them all together you get 12 and if you take 4 3s and add them together you get 12