Which of the quadratic functions below has exactly one x-intercept? y = x2 − 9 y = x2 − 6x + 9 y = x2 − 5x + 6 y = x2 + x − 6

Can some one explain how to slove specifically, what is the value of x? 0.9(x+1.4)-2.3+0.1x=1.6 enter the answer as a decimal in the box. x= ?

Aculinary club earns $1360 from a dinner service. they sold 45 adult meals and 80 student meals. an adult meal costs twice as much as a student meal. what is the cost of an adult meal?

State how many imaginary and real zeros the function has. f(x) = x3 - 20x2 + 123x - 216