Harriet is comparing the costs of calling cards. to use card a, the cost is $1.00 to connect and then $0.04 per minute. to use card b, it costs $0.65 to connect and then $0.06 per minute. for what number of minutes does it cost the same amount to use each card for a single call? (enter only the number.)

lo.lll

step-by-step explanation:

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18

answer: group b.

step-by-step explanation: