Which expression includes the factors that can be used to find the zeros of this function? f(x) = 5x² + 12x – 9

A. (x + 1)(5x – 9)
B. (x – 1)(5x + 9)
C. (x + 3)(5x – 3)
D. (x – 3)(5x + 3)

In the 30-60-90 triangle below side s has a length of and side r has a length

Apsychology student wishes to investigate differences in political opinions between business majors and political science majors at her college. she randomly selects 100 students from the 260 business majors and 100 students from the 180 political science majors. does this sampling plan result in a simple random sample? why or why not? no, because each group of 200 students in the sample does not have the same chance of being selected. yes, because each group of 200 students in the sample has the same chance of being selected. no, because each individual student does not have an equal chance of being selected. yes, because each individual student has the same chance of being selected.

[15 points]find the least common multiple of the expressions: 1. 3x^2, 6x - 18 2. 5x, 5x(x +2) 3. x^2 - 9, x + 3 4. x^2 - 3x - 10, x + 2 explain if possible