Question

help please

Answer 1

yes your correct

Answer 2

i can check all the other ones too!

Answer 3

perfect! let me post them now

Answer 4

okay!!

Answer 5

do them one at a time though

Answer 6

I always get confused with the domain and the range

Answer 7

this site right here is the best site in the world!
http://www.regentsprep.org/Regents/math/algtrig/ATP5/DomainRange.htm

Check it out and tag me when your done so I can help you!

Answer 8

Is the domain the set of all real numbers?

Answer 9

@claritamontano

Answer 10

@jim_thompson5910

Answer 11

yes, the domain is the set of all real numbers

Answer 12

any x value works as the input

Answer 13

so that rules out C

Answer 14

and is the range also the set of all real numbers?

Answer 15

okay im here

Answer 16

are my answers correct for the second question?

Answer 17

the range is also the set of real numbers (any y value is possible for the output)

Answer 18

yeah that seems to look right

Answer 19

next question!

Answer 20

agreed

Answer 21

f(0) is not 10

Answer 22

locate 0 in the x row

then look directly below, you'll see 3

Answer 23

that means f(0) = 3

Answer 24

and we don't know enough about the function to make a very sweeping claim that the range is the set of all real numbers

Answer 25

good

Answer 26

i agree with that.

Answer 27

same

Answer 28

no this is not a function,

Answer 29

when x = 3, what is the value of y?

Answer 30

because, there has to be one x value for a y value and here x equals many y values

Answer 31

also if it doesnt pass the vertical line test then it cant be a function.

Answer 32

do you know what the vertical line test is??

Answer 33

much better

Answer 34

good job!

Answer 35

I think is right!!

Answer 36

yup i agree!

Answer 37

i got 24

Answer 38

23 is correct


f(x) = 2x^2+5*sqrt(x-2)

f(3) = 2(3)^2+5*sqrt(3-2)

f(3) = 2(3)^2+5*sqrt(1)

f(3) = 2(3)^2+5*1

f(3) = 2*9+5*1

f(3) = 18 + 5

f(3) = 23

Answer 39

correct!

Answer 40

idk about this one...@jim_thompson5910

Answer 41

i think its right but i want you to get a second opinion

Answer 42

@jim_thompson5910 what do you think?

Answer 43

you are correct

Answer 44

any number greater than -2 or -2 itself works in the domain

Answer 45

Thank you both so much!

Answer 46

your welcome!

Answer 47

I'm unsure of how I should distribute the medals

Answer 48

hah give them to jim! its okay!

Answer 49

@jim_thompson5910 would you mind giving one to @claritamontano ?

Answer 50

you are so sweet its okay medals dont matter to me i like helping people. :)