Lisa spends 1/4 of her earnings on rent and 1/5 of her earnings on food let m stand for her monthly earnings in dollars. which of the following expressions represents the number of dollars lisa has left at the end of the montj after paying rent and buying food

Step-by-step explanation:

Let her total earnings be $m

Rent = m/4

Food = m/5

Let the among left be X

: m/4 + m/5 + X = m

Multiply each term by 20

5m + 4m + 20X = 20m

Collecting like terms

20X = 20m - 5m - 4m

20X = 11m

X = 11m/20

Amount left = $11m/20

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.

$4034.40

the perimeter of the field is the sum of the lengths of the four sides:

47 yd + 158 yd + 47 yd + 158 yd = 410 yd

the cost of 3 ft (1 yd) of fence is 3×$3.28 = $9.84.

so the cost of jake's wood perimeter fance is

(410 yd) × ($9.84 /yd) = $4034.40