Write an equation to solve: 1. a scuba diver dives down 20 feet in the ocean. he then swims 11 feet back up towards the surface. what is the position of the scuba diver relative to the surface? 2. you and your friend play a video game. you have a final score of 40 points, and your friend has a final score of -21 points. by how many points did you win?

An office supply company conducted a survey before marketing a new paper shredder designed for home use. in the survey, 80 % of the people who tried the shredder were satisfied with it. because of this high satisfaction rate, the company decided to market the new shredder. assume that 80 % of all people are satisfied with this shredder. during a certain month, 100 customers bought this shredder. find the probability that of these 100 customers, the number who are satisfied is 69 or fewer.

Which equation is equivalent to the given expression? -(1/2y+1/4) a. -1/4(1+2y) b. 1/4(2y-1) c. -2(1/4y-1/8) d. 2(1/8-1/4y)

Annabelle's homework is 75% it took her three hours how long should she estimate it will take her to complete her homework.