Which system of equations is represented by the matrix below? {-4 0|7}
{3 5|9}

A. -4x=7
3x + 5y = -9

B. -4x=7
5x + 3y = -9

C. -4y = 7
3y + 5x = -9

125 tickets were sold for the jazz band concert for a total of $1,022. students tickets cost $6 each, and general admission tickets cost $10 each. how many of each kind of tickets were sold?

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

Combine like terms to create an equivalent expression. make sure to simplify coefficients and constants as well. -6/5-2/3v+4/15+1/3v