Which of the following is a monomial?
a. 3x2 + 2x − 1
b. 4
c. 3x + 4
d. 2x − 1

Can someone answer it, and plot it, for 20 points and brainliest answer? p.s. they're the same ! : )

Identify an equation in point slope form for the line perpendicular to y=3x+5 that passes through (4,-1)

Aproduction manager test 10 toothbrushes and finds that their mean lifetime is 450 hours. she then design sales package of this type of toothbrush. it states that the customers can expect the toothbrush to last approximately 460 hours. this is an example of what phase of inferential statistics