Tammy wants to get change for $1. the only coins she can get are half dollars, quarters, and nickels. how many diferent ways can she get $1 using only these coins?

Arectangle plot measure 20ft. by 30ft. a 3-ft.-wide sidewalk surrounds it.find the area of the sidewalk.

Asix-sided die of unknown bias is rolled 20 times, and the number 3 comes up 6 times. in the next three rounds (the die is rolled 20 times in each round), the number 3 comes up 6 times, 5 times, and 7 times. the experimental probability of rolling a 3 is 10 %, which is approximately % more than its theoretical probability. (round off your answers to the nearest integer.)

What are linear equations? could'ya explain too me, ? ! and how do you see what graph is a proportional relationship?