Using the substitution method, Vito is solving the following system of equations algebraically. Which equivalent equation could Vito use? y=-3x-4
2x-3y=-21

A. 2(-3-4)+3x=-21
B. 2x-3(-3x-4)=-21
C. 2(3x-4)+3x=-21
D. 2x-3(3x-4)=-21

Which two undefined geometric terms always describe figures with no beginning or end?

Car a and car b were in a race .the driver of car b claimed that his car was twice as fast as car a

Jo divides a candy bar into eight equal pieces for her children to share she gives three pieces to sam three pieces to leslie and two pieces to margie rose the two month old baby does it doesn't get any what fraction shows how muchw candy each of the four children got. what's the answer to my question