Paula is solving the equation x2 + 22x = 15 by completing the square. What number must be added to both sides of the equation to complete the
square?
A. 1
B. 11
С. 44
D. 121

Find the greatest common factor of -30x 4 yz 3 and 75x 4 z 2.

Pls brainliest will be awarded if answer is correct

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.