Mark has a bag containing a mixture of 30 green and white marbles. without looking, he guesses that half of the marbles in the bag are green. he randomly selected 1 marble from the bag, recorded the color, and returned the marble to the bag. after 15 trials, mark has drawn 10 green marbles and 5 white marbles. which of the conclusions below is best supported by his data? the bag contains more white than green marbles. the bag contains 10 green marbles and 20 white marbles. the bag contains an equal amount of each color. the bag contains more green than white marbles.

$53.50

step-by-step explanation:

you have to subtract the amount of money chuck earned ($72.50) by the cost of the gas for the mower ($11.25) and the new string for the trimmer he bought ($7.75).

72.50-11.25=61.25

and then subtract $61.25 by the second thing he bought (the new string for the trimmer)

61.25-7.75=53.5

so in total it's $53.50 (53 dollars and 50 cents)

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.