He worked for 12 days. 12 x 2 = 24
we know that
A relationship between two variables, x, and y, represent a direct variation if it can be expressed in the form 
in this problem we have

so
<u>Find the value of the constant k</u>

substitute


the equation is equal to

<u>Find the value of y when
</u>
substitute the value of x in the equation


therefore
<u>the answer is</u>

Answer:
b^2-4ac >0 the roots are real
Step-by-step explanation:
b^2-4ac >0 the roots are real
b^2-4ac = 0 there is 1 root
b^2 -4ac <0 the root are complex