What is the length of qr in the given figure?

a) 10

b) 8

c) 6

d) 5

Which of the following quartic functions has x = –1 and x = –2 as its only two real zeroes?

How many sides does a regular polygon have if each exterior angle measure is 45 degrees explain your answer, i really don't understand this.

Mackenzie needs to determine whether the rectangles are proportional. which process could she use? check all that apply.