Find the missing factor of 2x^2+17x-9=(2x-1) ()

What does the sign of the slope tell you about a line?

Using only the digits 5, 6, 7, 8, how many different three digit numbers can be formed if no digit is repeated in a number?

Julia bought 7 hats a week later half of all her hats were destroyed in a fire. there are now only 12 hats left with how many did she start