Choose all of the expressions that are equal to −9.

|−9|
−(−9)
−|−9|
−|9|
the distance from zero to nine
the opposite of nine

Average acceleration: i have no idea how to do this.

If x-1 and x+3 are the factors of x3+10x2+ax+b find a and b

Tommy buys a sweater that is on sale for 40% off the original price. the expression p -0.4p can be used to find the sale price of the sweater, where p is the original price of the sweater. if the original price of the sweater is 50, what is the sale price?