Use the square root property to solve quadratic equations of the form a(bc+c)2 + d=k, having real or complex solutions.

Royal Tires Co. has found that it revenues, R, can be modeled using a quadratic equation of the form R= 180,000-3n2, where n is the quantity of tires it sells. How many tires must it sell in order to reach a revenue of $120,000?

the direct variation says that:

then the equation is of the form is given by:

            where k is the constant variation.

from the given table:

consider any value of x and m(x)=y

x = 2 and m(x)=y = 3

substitute these value in [1]; we have;

divide both sides by 2 we get;

⇒

check:

put x = -1 and m(x) = -1.5

substitute in the equation:

-1.5 = -1.5                   true

therefore, the function m(x) represents a direct variation

graph of this function as shown below:

12cm

the answer is d

quit

step-by-step explanation: