2xsquare + 17x - 30 Need to factor completely

Answer is (2x-3)(x+10)

But, how to get to that answer?? ​

You will get 25 points an image of a rectangular prism is shown below: part a: a cross section of the prism is cut with a plane parallel to the base. what is the name of the shape created by the cross section? explain your answer. (5 points) part b: if a cross section of the prism is cut perpendicular to the base, what would be the shape of the resulting cross section? explain your answer. (5 points)

The table above shows approximate conversions from gallons to liters. what is the value of x?

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.