Please help! (14 points!) 1.) Which of the following is a tangent?
a. PV
b. US
c. RT
d. PQ

2.) Which of the following is a chord?
a. PV
b. US
c. RT
d. PQ

3.) Which of the following is in inscribed angle?
a. PVU
b. UST
c. QUS
d. USR

Geometry. i need step by step explanation on how to do each problem.

Find the value of a. the diagram is not to scale. a quadrilateral is drawn. the upper and lower sides are parallel. the interior angle in the upper left corner is labeled a degrees. the angle in the upper right corner is labeled 113 degrees. the angle in the lower right corner is labeled b degrees. the angle in the lower left corner is labeled 36 degrees. a. 36 b. 144 c. 54 d. 126

What is the solution to this system of equations? y= 2x - 3.5 x - 2y = -14