How many unique solutions are there to the system of equations below? x+3y=7
-2x-6y=1

a zero
b one
c two
d infinite

C. two.

Step-by-step explanation:

They are:

Substitution method.

Elimination method.

24

step-by-step explanation:

if it takes 8 pounds to make 12 divide 12 by 8 and you get 1.5, 1.5 x 16 = 24

answer: all of the odd numbers were opened

the first person was the one that was opening all of the lockers. since one is odd, this causes all of the odd number lockers to be opened in the end.