Explain how System 1 becomes equivalent to System 2. System 1:
Ax + By = C
Lx + My = N

System 2:
Ax + By = C
(A − L)x + (B − M)y = C − N

The first equation in System 1 is the sum of the equations in System 2. The second equation in System 2 is the first equation in System 2.
The first equation in System 1 is the difference of the equations in System 2. The second equation in System 1 is the first equation in System 2.
The second equation in System 2 is the sum of the equations in System 1. The first equation in System 2 is the first equation in System 1.
The second equation in System 2 is the difference of the equations in System 1. The first equation in System 2 is the first equation in System 1.

Quick! a survey of 57 customers was taken at a bookstore regarding the types of books purchased. the survey found that 33 customers purchased mysteries, 25 purchased science fiction, 18 purchased romance novels, 12 purchased mysteries and science fiction, 9 purchased mysteries and romance novels, 6 purchased science fiction and romance novels, and 2 purchased all three types of books. a) how many of the customers surveyed purchased only mysteries? b) how many purchased mysteries and science fiction, but not romance novels? c) how many purchased mysteries or science fiction? d) how many purchased mysteries or science fiction, but not romance novels? e) how many purchased exactly two types of books?

Acolony contains 1500 bacteria. the population increases at a rate of 115% each hour. if x represents the number of hours elapsed, which function represents the scenario? f(x) = 1500(1.15)" f(x) = 1500(115) f(x) = 1500(2.15) f(x) = 1500(215)

What is the measure of each of the two angles formed by the bisector of the diagonal of a rhombus if the original angle measures 58 degrees?