Evaluate the expression shown below and write your answer as a mixed number in simplest form.

Y=4x^2+x-1 solve using quadratic formula

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?

Simplify the expression 10/11(22z) + (a+5) -1