What is the value of p? the correct answer is 50°

more details:

180-90= 90
180-140= 40
40+90= 130
180-130= 50

the answer is 50°

36x2 + 49y2 = 1,764 the foci are located at: (-√13, 0) and (√13,0) (0, -√13) and (0,√13) (-1, 0) and (1, 0)edit: the answer is (- the square root of 13, 0) and (the square root of 13, 0)

Find the value of the variable and the length of each chord for #5 and #6.

Point q is equidistant from the sides of ∠tsr. find m∠rst.