Question

hi you guys, I need serious help with problems.:)
What is the range of the function f(x) = -10x for the domain {-4, -2, 0, 2, 4}?

a.{40, 20, 0, -20, -30}

b.{0, 20, 40, 60, 80}

c.{-4, -2, 0, 2, 4}

d.{-40, -20, 0, 20, 40}

Answer 1

d. Put the values of x=-4,-2,0,2,4 in the eqn. f(x)=-10*x, and you get the set of values.

Answer 2

thanks so much .. can you help with a few more

Answer 3

The number of hours required to do a painting job is represented by the function f(x)=2x , where f(x) gives the number of hours and x is the number of painters doing the job. How much time will {4, 10, 14, 16, 18} workers take to do the job?

a.{0.2, 0.7, 0.8, 0.9, 1.0}

b.{0.1, 0.4, 0.6, 0.8, 0.9}

c.{0.2, 0.59, 0.73, 0.84, 0.9}

d.{0.11, 0.125, 0.14, 0.2, 0.5}

Answer 4

do i divide or multiply when i try to multiply i do not get a decimal

Answer 5

I don't get this question...

Answer 6

i have to plug the range of numbers in f(x) i think because it says f(x) gives number of hours and the question is how many hours will it take

Answer 7

"The number of hours required to do a painting job is represented by the function f(x)=2x , where f(x) gives the number of hours and x is the number of painters doing the job"
This function does not make sense.
the more painters you have, the less time it will take to finish the painting job.

Answer 8

f(x) = 2 / x makes more sense

Answer 9

so i am dividing the range by 2?

Answer 10

i finished the answer already thanks :) idk how u guys do this

Answer 11

If the range of the function f(x)= 5x − 3 is {-13, -8, -3, 12, 17}, what is its domain?\

{0, 1, 2, 3, 4}

{-2, -1, 0, 1, 2}

{-2, -1, 0, 3, 4}

{-4, -3, 0, 3, 4}

Answer 12

do i plug in -13 for (x)

Answer 13

and so on....

Answer 14

@perl :Exactly what I was thinking. 2/x could be possible. Otherwise, this is a wrong function, no question.