Which linear system has the solution (6, 6)

a: 4x - 3y = -1 -2x + y = -3
b: x + y = 12 3x - 2y = 6
c: 3x + y = 4 4x - 3y = 1
d: 4x + 3y = 0 2x - y = 0

Abcd is a square. what is the measure of angle bac

Write the factored form of this trinomial 9x^2+18x-7

Harry owes the bank money. to repay his debt, he paid $150 back to the bank each month. after 10 months, his remaining debt was $6900. what was the original amount of harry's debt? how long did it take harry to pay back his entire debt?