system of linear inequalities
two or more linear inequalities on a graph
solution of a system of linear inequalities
any point that is true for BOTH inequalities
system of equations
two or more linear equations on a graph
cost
the amount of money you spend on something
revenue
the amount of money you earn as income
break-even point
when cost is equal to revenue; expenses equal income
solution to a system of linear equations
a coordinate point that is a solution to both linear equations on a graph
one solution
when two lines intersect at one point, there is one solution
no solution
when two lines do not intersect, there is no solution
infinitely many solutions
when two lines are the same line, they intersect at infinitely many points
substitution
to replace a variable with an expression that is equivalent
elimination
to add or subtract to equations to eliminate one variable, then solve for the other
sweet potato
a yam
beet root
a red vegetable