What is the solution of the system of equations?

x - 2y = 4
-3x + 6y = 12

A.) (0,-2)
B.) infinitely many solutions
C.) (-2,4)
D.) no solution

2people are trying different phones to see which one has the better talk time. chatlong has an average of 18 hours with a standard deviation of 2 hours and talk-a-lot has an average of 20 hours with a standard deviation of 3. the two people who tested their phones both got 20 hours of use on their phones. for the z-scores i got 1 for the chatlong company and 0 for talk-a-lot. what is the percentile for each z-score?

What is the value of the expression below? 148+(-6)| + |– 35= 7|

Rhombus adef is inscribed into a triangle abc so that they share angle a and the vertex e lies on the side bc . what is the length of the side of the rhombus if ab=c, and ac=b.