5x - 4 + 2x = 3
Need help ASAP

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

The perimeter of a rectangle is 42 inches. if the width of the rectangle is 6 inches, what is the length

Could someone me with this question i’ve been stuck on it for 20 minutes