Solve each system using substitution.
-x^2-x+19=y
x=y+80

Which statement is true 1.the pythagorean theorem can be used to find the missing side of any triangle 2.the pythagorean theorem can be used to find the missing side of any polygon 3. the pythagorean theorem can be used to find the missing side of any right triangle 4.the pythagorean theorem can be used to find the missing side of any isosceles triangle

Which of the following expressions is equal to 2x^2+8

Match each inequality to the number line that represents its solution