Use the substitution method to solve the system of equations. Choose the correct ordered pair. y= -2x+11

y=-3x+21

What are the solutions of the system? solve by graphing. y = -x^2 -6x - 7 y = 2

Which of the following is best modeled using a linear equation y=ax+b, where a is less than 0?

You have 37 coins that are nickels, dimes, and pennies. the total value of the coins is $1.55. there are twice as many pennies as dimes. find the number of each type of coin in the bank.