For this question, determine whether QR and ST are parallel, perpendicular, or neither. Q(9, 10), R(-5,2), S(-8, -2).
T(-1.2)

Neither

Perpendicular

Parallel

Write numerical coefficient of y² in the expression 2x² - 15xy – 7y²

Solve for x and y: 217x + 131y = 913; 131x + 217y = 827

Consider circle c with angle acb measuring 3/4 radians.if minor arc ab measures 9 inches, what is the length of the radius of circle c? if necessary, round your answer to the nearest inch.