20. a. Use the distributive property to write an equivalent expression for: 3(x - 4y) -2(y + 7x) b. Simplify your answer.

For the function, f(x) = -5x 2, find f(-4).

Omar is going on a road trip! the car rental company offers him two types of cars. each car has a fixed price, but he also needs to consider the cost of fuel. the first car costs $90 to rent, and because of its fuel consumption rate, there's an additional cost of s0.50 per kilometer driven.

Find the value of p for which the polynomial 3x^3 -x^2 + px +1 is exactly divisible by x-1, hence factorise the polynomial