If a = 3, what is the value of 2a2.

A. 6

B. 12
C. 18

D. 36

Solve the system of equations. 2x-2y=-4 and x+y=8. show work

Sade bought 21 1/2 lb. of ground beef. he used 1/4 of the beef to make tacos and 2/3 of the remainder to make quarter-pound burgers. how many burgers did he make?

Aline with a slope of -7 passes through the points (u,0) and (8,-7) what is the value of u?