What are the roots of 4x2 + 5x − 9 = 0? negative start fraction one over two end fraction comma start fraction nine over two end fraction
start fraction three over two end fraction comma negative start fraction three over two end fraction
1, negative start fraction nine over four end fraction
start fraction one over four end fraction comma −9

Can someone me with my hwplz(only the circled ones)

Find the value of the variable and the length of each secant segment.

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