Use the substitution method to solve the system of equations. choose the
correct ordered pair.
y= 10x - 9
y = x + 18
a. (1,1)
b. (2,11)
c. (3,21)
d. (4, 31)

Which function has the domain x> -11

Darcy deposited $390 into a savings account. as long as the account balance remains at or above $150, she does not have to pay a service fee for the account. for how many months can she withdraw $40 a month without having to pay service fees? a) 3 b) 5 c) 6 d) 9

Select the correct answer from each drop-down menu. a parabola is given by the equation y = x2 − 2x − 3. the directrix of the parabola is given by the equation . the focus of the parabola is .