Pls!
factor each completely. *hint: check for perfect square trinomials, difference of squares, and quadratic trinomials.
1) k^2+2k-24
2) 4k^2-1
3) 25b^2-30b+9

The mean of 10 values is 19. if further 5 values areincluded the mean becomes 20. what is the meanthese five additional values? a) 10b) 15c) 11d) 22

Write the factored form of this trinomial 9x^2+18x-7

The plant were you work has a cylindrical oil tank that is 2.5 feet across on the inside and 10 feet high. the depth of the oil in the tank is 2 feet. about how many gallons of oil are in the tank?