Create a equation to solve for the mid segment with bases x-6 and 2x-9

If f(x)=-x^2+6x-1 and g(x)=3x^2-4x-1,find(f+g)(x)

Marina baked cookies. she gave 3/4 of the cookies to the scout bake sale. she shared the remaining 6 cookies with her friends. how many cookies did marina bake?

How many 3-digit numbers can you write using only digits 1 and 7? (of course, digits can repeat.) how many 3-digit numbers can you write using only digits 1 and 7? (of course, digits can repeat.)