A circle is centered on point b. points a, c and d lie on its circumference. if angle abc measures 40 degrees, what does angle adc measure?

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?

Lines a and b are perpendicular. if the slope of line a is 3, what is the slope of line b?

The temperature of a chemical solution is originally 21 ? c . a chemist heats the solution at a constant rate, and the temperature of the solution 75 ? c after 1212 12 minutes of heating. the temperature, tt t , of the solution in ? c is a function of x , the heating time in minutes. write the function's formula.