Answer:
20 is not a perfect square.
21 is not a perfect square.
24 is not a perfect square.
25 is a perfect square.
The best way to do this is to set up a proportion
30 20
---- = -----
0.5 x
then cross multiply and divide
20 × 0.5 = 10/30=1/3
he needs 1/3 tank of gas to drive 20 miles
I hope I've helped!
First, you subtract the equations. (3x^2-2x+5) - (x^2+3x-2) so you get 3x^2 - 2x + 5 - x^2 - 3x + 2. This leads you to 2x^2 - 5x + 7. If you multiply that by 1/2 x^2, you get x^4 - 5/2(x^3) + 7/2(x^2)
The [common difference, d, ] in an arithmetic sequence can be found by subtracting the first term from the second term
