Questions on Algebra: Functions, Domain, NOT graphing answered by real tutors!

Tutors Answer Your Questions about Functions (FREE)

Question 433330: how would i rewrite a quotient as multiplication by the reciprocal here is an example. 12/(1/2)
Click here to see answer by stanbon(75887)

Question 433380: f(x)=x+1/xsquared+x -6 find x and y intercepts and the domain
Click here to see answer by stanbon(75887)

Question 433379: what does Descrates' rule of sign tell me about the number of pos real zeros and number of neg real zeros of the function g(x)=5x^6-3x^3+x^2-x so that is 5x raised to the 6th power- 3x raised to the 3rd plus x squared-x
Click here to see answer by stanbon(75887)

Question 433512: The given function f is one-to-one.

a) Find the domain of f
b) Find f'
c) Find the range of f
d) If c is not equal to 0, under what conditions on a, b, c, and d if f=f'
Click here to see answer by stanbon(75887)

Question 433603: solve
-0.1x < -9
Click here to see answer by stanbon(75887)

Question 433601: find the domain of the function
g(x)= 9/9-4x
* note 9-4x is the bottom number of the fraction and 9 is the top number.
Click here to see answer by stanbon(75887)

Question 433681: (4x/x+15)
Click here to see answer by Alan3354(69443)

Question 433143: Consider the following formula: y = 3 ( x + 5 ) ( x - 2 )
Which of the following formulas is equivalent to this one?

A. y=3x2+9x-30
B. y=x2+3x-lO
C. y=3x2+3x-lO
D. y=3x2+3x-30
And why??? how is this solved?
Click here to see answer by pheonix1974(2)

Question 433705: find the domain of p?
p(x) = x2 - 2x +10
Click here to see answer by richard1234(7193)

Question 433954: Can you help me solve this problem?:
Find the domain of f(x)=sqrt(x^2+x-12)
Click here to see answer by robertb(5830)

Question 433954: Can you help me solve this problem?:
Find the domain of f(x)=sqrt(x^2+x-12)
Click here to see answer by Gogonati(855)

Question 434182: what is the domain of f(x)= square root of 3-x
Click here to see answer by stanbon(75887)

Question 434182: what is the domain of f(x)= square root of 3-x
Click here to see answer by htmentor(1343)

Question 434185: state the domain and range of g(t)=-1/t^2. what is the independent variable?
Click here to see answer by stanbon(75887)

Question 434196: I am having trouble remembering the basics of functions! here is my question:
if p(x) = (x+3)squared
and q(x) = 3-x
solve such that p(x) = q(x)
I just set the two functions equal to each other and get xsquared + 7x = -6, but what does that mean?
Click here to see answer by Alan3354(69443)

Question 434302: is the inverse of f(x)=2x^2-3x+4 a function?
Click here to see answer by solver91311(24713)

Question 434608: If f(x)=2x+1 and g(x)=x-12, then f(g(x)) =??

Thank you for your help!
Click here to see answer by nerdybill(7384)

Question 434922: Hiiii so i have a problem on functions. i know how to graph regular functions, but when "f" is put in I AM LOST. like an example is f(x) = x2 + x - 12
i rlly am just completely lost. i could use some major help please! thanks!!
Click here to see answer by josmiceli(19441)

Question 435474: Can a exponential function cross the x axis of a graph?
Click here to see answer by Alan3354(69443)

Question 435474: Can a exponential function cross the x axis of a graph?
Click here to see answer by solver91311(24713)

Question 435472: My daughter needs to write the function rule for
x y
0 1
1 3
2 5
3 11
4 25
5 55
6 95
Not all numbers are divisible by 5 - she tried squaring - exponents - she's stumped. any help would be appreciated. Thank you.
Click here to see answer by stanbon(75887)

Question 435789: Provide an example of at least five ordered pairs that do not model a function.
� The domain will be any five integers between 0 and 20.
� The range will be any five integers between -10 and 10.
� Your example must not be the same as those of other students or the textbook.
� Why does your example not model a function?
Click here to see answer by richard1234(7193)

Question 435937: If f(x)=x^(3)+10x^(2) & g(x)=9x^(2)-10
f/g is undefined at two points A&B where A What is A? What is B?
This combination of functions problem has me stuck plz help.
Click here to see answer by Gogonati(855)

Question 435960: What is the f^-1(x) or the inverse of 10x+3/3x+5?
I keep getting (5x+3)/(3x+10)...not sure what I'm doing wrong :(
Click here to see answer by Gogonati(855)

Question 436064: A reservation clerk worked 12.6 hours one day. She spent twice as much time entering new reservations as she did verifying old ones and one and a half as much time calling to confirm reservations as verifying old ones. How much time did she spend entering new reservations?
Click here to see answer by josmiceli(19441)

Question 436107: Determine the domain and range of the function.
f(x)=(x+3)^2 -2
Click here to see answer by robertb(5830)

Question 436469: I do not know how to find this answer please help.
What is the domain of the function and express the answer in internal notation: f(x)= 4x^2-7x+3
Click here to see answer by robertb(5830)

Question 436732: Is this equation a function or not? Why? f(x)= |x|
Click here to see answer by MathLover1(20849)

Question 436781: Find the domain of sqrt(24-3x)
Click here to see answer by stanbon(75887)

Question 437401: given the function f described by f(x)-6x,find each of the following:
f(-16)
f(13)
f(23)

Click here to see answer by ewatrrr(24785)

Question 437684: Give the equation of the horizontal asymptote, if any, of the function.
T(x) = 2x^2-9x-3/6x^2-6x+5
A) y = 3/2 B) y = 1/3 C) y = 0 D) None
I tried to solve it like this: 2x^2/6x^2 = 1/3. y = 1/3
I am not sure if that is correct.
What are the steps to solve it and the correct answer?
Thank you very much for your help.
Click here to see answer by Gogonati(855)

Question 437761: This is what i submitted and am being told that the composition of one of my answers is incorrect. I don't know which one.
(f � g)(x) and (g � f)(x)
f(x)=√(x+1),g(x)=x+2

f(x+2)=√(x+2+1)
=√(x+3)
=x+3
g(√(x+1))=√(x+1)+2
=x+1+2
=x+3

Click here to see answer by stanbon(75887)

Question 437949: whats the relationship between 60 and 20 and 75 and 25 it has to be the same
Click here to see answer by stanbon(75887)

Question 438157: What is the domain of (5x^2-5x+2)/(4-x^2)?
Click here to see answer by stanbon(75887)

Question 438333: I need help on finding the domain of 5x-3/4x+7
Click here to see answer by nerdybill(7384)

Question 438432: x^3-6x^2+7x+2=0
Click here to see answer by Alan3354(69443)

Question 438785: Evaluate the function f(x) = 4x + 6 for x= 4
Click here to see answer by nerdybill(7384)

Question 439075: Select any two integers between -12 and +12 which will become solutions to a system of two equations.
Write two equations that have your two integers as solutions. Show how you built the equations using your integers. Solve your system of equations by the addition/subtraction method.
Click here to see answer by stanbon(75887)

Question 439364: I need help with derivates and could not find a section.
Find the derivative of f(x) = 3x^-2 + 4x^-3 + 2x^-4
Thank you for your assistance!! =]
Click here to see answer by Alan3354(69443)

Question 439011: how do i find the domain of log(x^2-1)+2
Click here to see answer by richard1234(7193)

Question 439565: Hello!
A man in a rowboat that is 2 miles from the nearest point A on a straight shoreline wishes to reach a house located at a point B that is 6 miles farther down the shoreline. He plans to row to a point P that is between A & B and is x miles from the house, and then he will walk the remainder of the distance. Suppose he can row at a rate of 3mi/hr and can walk at the rate of 5mi/hr. If T is the total time required to reach the house, express T as a function of x.
Thanks
Mak
Click here to see answer by MathLover1(20849)

Question 439594: If f(x) = 5x2 � 2x + 4 and g(x) = 3x � 6, what is f(x) � g(x) ?
Click here to see answer by asuar010(338)

Question 439719: let f(x)= 3x-1 and g(x)= x^2+1. Evaluate (f*g)(-1)
Here is what I did so far before getting stuck:
(3x-1)(x^2+1)(-1)
(3x^3+3x-x^2-1)(-1)
I think I am supposed to factor out the 3, but not sure if that is possible,
Click here to see answer by stanbon(75887)

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