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

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Question 385443: Any help with figuring out the steps to these problems will be greatly appreciated. I have a Functions test tomorow and I'm not feeling very confident. I pulled these out of a practice test.
If f(x)=-x+8 and g(x)=-5x+4 find h(x) when:
a) h(x)=f(x)+g(x)
b) h(x)=g(x)-f(x)
c) h(x)=f(x)x(times)g(x)
Click here to see answer by edjones(8007)

Question 385511: le f(x)= x^2-4x and g(x)=4/x-4, find (g0f)(-4)
Click here to see answer by stanbon(75887)

Question 385510: let f(x)= 6+x and g(x)= x^2-x+1, find (f-g)(x)
Click here to see answer by stanbon(75887)

Question 385604: given f(x)5x^3, find f^-1(x). then state whether f^-1(x) is a function
Click here to see answer by stanbon(75887)

Question 386152: For which intervals is the following function increasing or decreasing?
y=2(x-4)^2=3
Click here to see answer by stanbon(75887)

Question 386406: range of y(x-x^2)=9+x^2

Click here to see answer by robertb(5830)

Question 386380: Find the inverse and the inverse's domain of f(x)=x^3-5
Click here to see answer by robertb(5830)

Question 386494: 0=3.82p-10.51
solve for p and show how you got p.
Click here to see answer by nerdybill(7384)

Question 386499: I'm not really understanding sine, cosine, and tangent. How do you know which one to use, and when? and how do you keep straight hypotoneuse and adjacents? Seems to me their always different.
Click here to see answer by Alan3354(69443)

Question 386139: determine the domain and the range of the function. Then state wheter the relation is a function
f(x)= |x^2-7|
Click here to see answer by jsmallt9(3758)

Question 386652: what is the answer for this math problem:
2(0)-3
Click here to see answer by stanbon(75887)

Question 386984: 3+1
Click here to see answer by Alan3354(69443)

Question 387032: What is the domain of f(x)=log(x-11)? Express the solution set in either set-builder or interval notation.
Click here to see answer by richard1234(7193)

Question 387060: Question: for each function determine whether it is one-to-one; if it is one-to-one, find a formula for the inverse
f(x)=2x^2+3x-5
tried factoring first, and Im not sure about what one-to-one means, I believe its when its not a parabola.
Click here to see answer by ewatrrr(24785)

Question 387503: How do you graph y=-1/2x to the third power?
Click here to see answer by Jk22(389)

Question 387716: consider f(x) = 15/sqrt(x+6)
is f(x) a function?
what is the domain of f(x)?
Click here to see answer by robertb(5830)

Question 387920: Given F(x)= 2x squared-8x+9, find all values of x for which f(x)=9
How do I solve this??
Click here to see answer by scott8148(6628)

Question 387961: given the fucnction h described by h(x)=x+6, find each of the following
h(0)
(h)-7
(h)15
(h)7
(h)x+2
Click here to see answer by rfer(16322)

Question 376320: 1. Find the inverse function of f. f(x)=the square root of 3-x
Click here to see answer by robertb(5830)

Question 387772: f(x)=sqrt(x+5) and g(x)=5x-7
find h(x)=(gof)(x).
Click here to see answer by jsmallt9(3758)

Question 387769: f(X)=sqrt(x+3)and g(x)=5x-4
find h(x)=(gof)(x)
Click here to see answer by jsmallt9(3758)

Question 387819: Find the value of the constants A, B, C and D in the following identity:
.
Click here to see answer by Fombitz(32388)

Question 388127: Can you please help me to understand how to do the following? Thank you.
Find specified values of functions.
1. Find f(-1) given f(x) =x^3 + 2x^2 +27
Click here to see answer by rfer(16322)

Question 388132: Can you please help me with the following?
How many gallons of a 30% alcohol solution must be mixed with 70 gallons of a 19% solution to obtain a solution that is 20% alcolhol?
Thank you
Click here to see answer by robertb(5830)

Question 388130: Can you please help me solve the formula for specified variables?
A: B=2 over 5(A-11)

Thank you
Click here to see answer by Fombitz(32388)

Question 388244: What are the domain and range of the relations: {(-1,-2),(1,-2),(3,1)}? Is the relation of the function?
A. D={-1,1,3};R={-2,1};yes
B. D={-2,1};R={-1,2,3};no
C. D={-1,-2,3};R={-1,1};no
D. D={-2,1};R={-2,1};yes
Thank you so much for all your help!!!!
God Bless and Happy Holidays!!!!!
Click here to see answer by MathLover1(20849)

Question 388504: Let f(x) = sqrt of x and g(x) = 8x+5. Determine the domain of the composite function and then find the compostie function.
(g * f)(x)
Domain _______________
(g * f)(x)=___________________
Click here to see answer by Fombitz(32388)

Question 388569: During a nine hour storm it snows at a rate of 1 inch per hour for the first two hours, at a rate of 2 inches per hour for the next six hours, and at a rate of 1 inch per hour for the final hour. Write and graph a compound function that gives the depth of snow during the snowstorm.
Not sure which section this would be in... I know this says no graph but I can probably figure out the graph on my own anyways.
Any help at all is appreciated greatly!
Happy holidays :)
Click here to see answer by texttutoring(324)

Question 388548: sqrt(8-x) - sqrt(x^2-4)
Click here to see answer by haileytucki(390)

Question 388821: Which set represents the domain of the relation shown below?
{(0,1),(0,2),(0,3)}
please help and thank you for taking your time out to help me!!!

Click here to see answer by stanbon(75887)

Question 388897: If g(x)=2x^2 find g^-1(x)
Please help
Click here to see answer by stanbon(75887)

Question 388935: find the domain g(x) = 10/9 - 7x
Click here to see answer by edjones(8007)

Question 388956: what is the natural domain of x^2-25 and g(x)=sqrt of x-2 over sqrt of x^2-25
Click here to see answer by edjones(8007)

Question 388957: f(x)= 5x-3, g(x)=absolute value of x+2. what is the answer for g[f(0)] and f[g(0)]
Click here to see answer by stanbon(75887)

Question 388957: f(x)= 5x-3, g(x)=absolute value of x+2. what is the answer for g[f(0)] and f[g(0)]
Click here to see answer by edjones(8007)

Question 389005: 5r - 9s = -37
9r + 5s = 103
solve using elimination method
Click here to see answer by haileytucki(390)

Question 389004: 6 + 5x < 41
solve using addition and multiplication principles
Click here to see answer by haileytucki(390)

Question 389003: 5/2x + 1/4x = 11/4 + x
solve for x
Click here to see answer by haileytucki(390)

Question 389135: Use the Factor Theorem to determine whether x-3 is a factor of
P(x) = 2x^4-5x^3+2x-33 .
Specifically, evaluate P at the proper value, and then determine whether x-3 is a factor.

Click here to see answer by Alan3354(69443)

Question 389253: Let f(x) = x2 � 3x � 7. Find f(�3).
THE X2 IS X SQUARED
Click here to see answer by richard1234(7193)

Question 389281: Let the function f be defined by the equation y = f(x), where x and f(x) are real numbers. Find the domain of the function.
f(x)= sqrt of x^2-64

(the sqrt is of the x^2-64 not just the x^2)
Click here to see answer by richard1234(7193)

Question 389375: solve
-10<=4x -3<=-2
Click here to see answer by robertb(5830)

Question 389442: How much snow is 4096cm in inches
Click here to see answer by ewatrrr(24785)

Question 389442: How much snow is 4096cm in inches
Click here to see answer by Alan3354(69443)

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