Doubling the radius of the cylinder will quadruple the volume.
Answer:
y=2.5
Step-by-step explanation:
First step find a common multiple, e.g. 45 and subtract
9x + 5y = 28 * 5
5x + 9y = 56 * 9
45x + 25y = 140
-(45x + 81y = 504)
-56y = -364
56y = 364
y = 6.5
Substitute into any equation
9x + 5(6.5) = 28
9x + 32.5 = 28
9x = -4.5
x = -0.5
x = -0.5 , y = 6.5
Since they give you the graph find the highest point in the curved line:
the line touches the number 100
so it's maximum height is 100 feet
now from where it touches 100 look at the time:
it hits 100 feet at 2.5 seconds
Recall that i represents the square root of -1, so by squaring it we get -1.
(2 + 4i)(7 - 3i)
= 14 - 6i + 28i + 12
= 26 + 22i