2.50 x 4 = 10
20 - 10 = 10
so his change would be $10
At 1/8 of a gallon you can mow 2 1/4 so for 1 gallon just multiply 2 1/4 by 8
16+2 is 18
-5t2 + 40t = 0
5t(-t+ 8) = 0
5t = 0 or t = 8
Answer:
On the right is a circle with centre (0, 0), radius r and (x, y) any point on the circle. Distance between (0,0) and (x, y) equals the radius, r. If the centre is (0, 0), the equation of the circle will be of the form x2 + y2 = r2.
