Johnny wants to buy the latest call of duty video game, which costs $49.99 johnny already had $12 in his bank account. he earns $5 per lawn mowing lawns after school. how many lawns must johnny now to be able to afford the video game?

8

Step-by-step explanation:

because of the minus 12 would be 37.99 times 5 8 times equals 40

stop cheating

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.