I have a test tomroww and I do not understand problems 7, 8, 9, 10, and 11. If you could help break these problems down for explanation that would be great

7. Describe the end behavior of the functions (can use words rises and falls) a) g(x) =- x +5x +1 b) f (x) = 7.5x - 28x - 20x + 5.5x 8. Simplify as much as possible a) (8 - 21) (3 + 71) b) (3 + 61) + (10 - 110) 9. Find the zeros of fix) = x'(x -3)-(x + 5) include multiplicity. 10. Use polynomial synthetic division to divide: a) (3x + 7x - 20) + (x + 5) b ) ( 4x + 3x + 10 ) + (x - 2 ) 11. Divide and simplify 2+ i 4-71