Write an expression that is equivalent to 28 using each of the following numbers and symbols once in the expression.
7
7
7
2
(exponent of 2)
+
-
( )

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?

If f(x)= sqrt4x+9+2, which inequality can be used to find the domain of f(x)?

Given the two similar triangles, how do i find the missing length? if a=4, b=5, and b'=7.5 find a'