A teacher asked his three students, Tom Helen and Sandy to complete 200 exercises the ratio of the exercises completed by Helen to the exercises completed by Sandy is 3:3:4. Tom receives 5 points for each completed exercise. Sandy receives 8 points for each exercise. If the three students altogether receive 1240 points, how many points does Helen receive for a completed exercise?

see attached

step-by-step explanation:

given the function as;

write the equation replacing f(x) with y

form   and fill a table containing values of y with corresponding values of x

you can take a range for   values of x as -3≤x≤3

solving for x=-3

for x=-2

repeat the same procedure to get the values of y for the remaining ,x=-1 to x=3

plot the values of y against values   of x and obtain the following graph

answer: bea's uncle is 25 years old.

step-by-step explanation:

given the equation , we can say that the variable "x" represents the age of bea's uncle. then to find his age, we need to solve for "x":

we must add 15 to both sides of the equation:

now we need to divide both sides of the equation by 3:

therefore, we can conclude that bea's uncle is 25 years old.

answer: none of these answers are correct only the second half is

step-by-step explanation: