Tracer works for a furniture store and earns a salary plus a commission based on sales. The equation below represents y, Tracey's earnings in a week when she sells x dollars' worth of furniture.

y = 0.05x + 300

What happens to Tracey's weekly earnings as the sales increase by S800?

A. increase by $15.00
B. increase by $25.00
C. increase by S40.00
D. increase by $55.00

a

step-by-step explanation:

solution:

the given function is ,

      =

the three roots of this quadratic function is , 0 ,8 and 10.all the roots are real and rational.

if a quadratic equation is of the form ,

sum of the roots = a + b +c= 0+8+10=18=  

product of roots taken two at a time = a b + b c+ c a = 0+80+0=80 =  

product of roots = a b c = 0=  

there are 11 doors in a hall starting from 0 to 11.the entry in the hall is permitted through gate number 0 and exit is allowed through only gate number 8 and 10.so, three roots(0,8,10) of quadratic function is given by entry and exit route of this hall.

what graph

step-by-step explanation: