(plz hlp me asap)
which expression is the multiplicative inverse of r, where r is a non-zero number?
a. -1/r
b. - r
c. 1/r
d. 2r

Imagine a new pasture with grass growing on it. every day after the seeds have germinated, the number of blades of grass in the pasture triples. after 18 days, the entire pasture is completely covered in grass. how many days did it take for the pasture to be one-third covered in grass?

How to simply and write the answer n a whole number

What is the area of a triangle with vertices at (-3 3) (-3,2) and (1,2)?