1. solve 5x+2y-3z=4
-2x-4y + z= -8
x+y+z=2

answer choices:
a. (2,0,0)
b. (0,2,0)
c. (2,-2,0)
d. (0,-6,9)

22. catie is starting a babysitting business. she spent $26 to make signs to advertise. she charges an initial fee of $5 and then $3 for each hour of service. write and solve an inequality to find the number of hours she will have to babysit to make a profit. interpret the solution.!