You have $8.80 in pennies and nickels. You have twice as many nickels as pennies. Write a system of linear equations that models the situation. Be sure to state what x and y represent. Solve those equations algebraically to determine how many of each type of coin do you have. please help

How to choose the sign of the radical in the denominator of the formula for the distance from a point to a line.

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much

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