A bike helmet which usually costs $57 is discounted 20%. About how much is the discount amount?

Fiona races bmx around a circular dirt course. if the radius of the course is 70 meters, what is the total distance fiona covers in two laps of the race? a. about 30,772 meters b. about 15,386 meters c. about 879.2 meters d. about 439.6 meters e. about 219.8 meters23 points hurry

17 in long 1.3 ft wide and 8in high what is the volume

How do you solving the solution of each system using elimination?