Leonardo works as a server. He gets a `20\%` tip on the food cost for every order. Leonardo got an `\$18` tip.

What was the cost of the food for his order? WHAT THE HECK IS THIS STUFFF I NEED HELP PLEAS

$90

Step-by-step explanation:

Ok, so since $18 is 20% you need to find the total by multiplying 18x5 since 20 is 1/5 of 100%.

18×5=90

$90

Step-by-step explanation:

If he gets a 20% tip and he made $18, then you need to calculate the amount of money he made which we can call m.

m x 20%= $18

m x .2 = $18

m= $18/.2

m= $90

sup

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.