Give the slope of the graph and the unit rate. PLS HELP I NEED THIS

7x+8y=-18, 4x-9y=-3 solve the system of equations

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

Prove that the value of the expression 7^8–7^7+7^6 is divisible by 43.