PLS I GIVE LOTS POINTS A square playground has an area of (9x2 + 60x + 100) ft2. The side length of the playground is (mx + n) ft where m and n are whole numbers. Find an expression for the perimeter of the playground. Find the perimeter when x = 7 feet.

Which system of linear inequalites is represented by the graph?

What would the rule be for the reflection of y=-3

Mariah is randomly choosing three books to read from the following: 5 mysteries, 7 biographies, and 8 science fiction novels. which of these statements are true? check all that apply. there are 20c3 possible ways to choose three books to read. there are 5c3 possible ways to choose three mysteries to read. there are 15c3 possible ways to choose three books that are not all mysteries. the probability that mariah will choose 3 mysteries can be expressed as . the probability that mariah will not choose all mysteries can be expressed as 1 −