Please solve this I am sooo confused help m please please please. I will give you 15 points.

Solve the system of the equations:

a.)
3(x+y)−7=12x+y
6(y−2x)−1=−45x

b.)
5(x+2y)−3=3x+5
4(x−3y)−50=−33y

c.)
4x+1=5(x−3y)−6
3(x+6y)+4=9y+19

1. a right triangle is graphed on a coordinate plane. find the length of the hypotenuse. round your answer to the nearest tenth. 2. use the angle relationship in the figure below to solve for the value of x. assume that lines a and b are parallel and line c is a transversal.

Solve each quadratic equation by factoring and using the zero product property. n^2 - 49 = 0

Which of the following describes how to translate the graph y = |x| to obtain the graph of y = |x+1|+1? shift 1 unit left and 1 unit down shift 1 unit left and 1 unit up shift 1 unit night and 1 unit down shift 1 unit nght and 1 unit up