So I know that 6 times 3 equals 21 but I don’t know how to find the total cups of paint for each problem. Please help asap! :(

The area (a) of a circle with a radius of r is given by the formula and its diameter (d) is given by d=2r. arrange the equations in the correct sequence to rewrite the formula for diameter in terms of the area of the circle.

Enter the values for the variables that give the correct simplified expressions, x = ≥ 0.

Solve the system of equationsy = 4x+1y=2+2x-2