Which system of equations has exactly one solution?
2x+y=3
5x-y-11
2x+2y= 1
-2x-2y=1
3x+y=-1
6x+2y=-2
3x-2y=4
-3x+2y = 4

James purchased a $205,000 home with a 30-year mortgage at 5.78%. if makes a $1500 monthly mortgage payment, how many months early will he pay off his mortgage? a. 180 months b. 224 months c. 127 months d. 136 months

Which is the equation of a line perpendicular to the line with the equation 3x+4y=8

When george started his current job, his employer told him that at the end of the first year, he would receive two vacation days. after each year worked, his number of vacation days will double up to five work weeks (25days) of payed vacation. how many vacation days will he have in 4 years