Jane and Jill were simplifying the expression

(2x² + x) + 21-x² + x) and obtained different answers. Who is

correct and why?

Amerchant has coffee worth $60 a pound that she wishes to mix with 50 pounds of coffee worth $90 a pound to get a mixture that she will sell for $70 a pound. how many pounds of the & 60 coffee should be used?

Which one is true about the hexagons ?

Write an algebraic expression to match each statement a. four less than 8 times a number b. twice the difference of a number and six c. nine from a number squared