Solve the system by the substitution method.

xy = 12
x2 + y2 = 40

a. {( 2, 6), ( 6, 2), ( 2, -6), ( 6, -2)}

b. {( 2, 6), ( -2, -6), ( 2, -6), ( -2, 6)}

c. {( 2, 6), ( -2, -6), ( 6, 2), ( -6, -2)}

d. {( -2, -6), ( -6, -2), ( -2, 6), ( -6, 2)}

Stefano accidentally dropped his sunglasses off the edge of a canyon as he was looking down. the height, h(t), in meters (as it relates to sea level), of the sunglasses after t seconds, is shown in the table. during its descent, the pair of sunglasses passed by a climber in the canyon 6 seconds after stefano dropped them. to the nearest meter, what is difference in elevation between stefano and the climber? 166 meters 176 meters 230 meters 240 meters its b.176 i took the test 166 is wrong and 176 is correct