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

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Question 639148: If f(x) = (x^2)-4 and g(x) = sqrt( 2x+4 ) , find:
a) f(g(0))
b) g(f(0))
Click here to see answer by Tatiana_Stebko(1539)

Question 639276: What's the answer to -0.38 - (-1.06) ?
Click here to see answer by MathLover1(20850)

Question 639319: State f(x) and g(x) for which f(x)*g(x)=2x^2+11x-6. How do you go about doing this problem? Thank you!
Click here to see answer by jim_thompson5910(35256)

Question 639388: Given that a(x)=x^2-5 and b(x)=6x+1
Evaluate (aob)(x) and (boa)(x)
I understand that this is (fog)(x) and (gof)(x)
So a(b(x)) is how I should insert the functions, but I'm not sure if I'm doing it right? Please help,
Thank You
Click here to see answer by jim_thompson5910(35256)

Question 639393: Find the formula for the inverse function for f(x)=7x^3+5
I'm not sure if I did this right but I got 3√y-5/7=x
If not then what steps should I take to get the inverse?
Thank You
Click here to see answer by opeodu(24)

Question 639398: I don't even know where to begin with this, please help explain the steps.
Solve: 2*log4(x)+3*log8(x)=10
Thank You
Click here to see answer by opeodu(24)

Question 639399: Express as a single logarithm: 3log5(x)-5[log5(y)+2log5(z)]
What are the steps I need to take? Please help
Thank You
Click here to see answer by lwsshak3(11628)

Question 639394: Not sure how to do this f(x) inverse function:
m(x)=1/x+3
Please explain,
Thank You
Click here to see answer by lwsshak3(11628)

Question 639539: I have to extend a function table to 5,6,7
X. Y
1. 1
2. 1+2
3. 1+2+4
4. 1+2+4+8
Then simplify the the expressions.
Then write an equation that relates x and y when the value of x=15

Click here to see answer by AnlytcPhil(1806)

Question 639582: What are the solutions to a and b
a+b=-3
a-b=-3
Click here to see answer by Alan3354(69443)

Question 639601: Use substitution to solve for x1 and y1
y=x2
y=6x-5
i already figured out that x2=5 and y2=25. and yes i am sure those are correct
Click here to see answer by Theo(13342)

Question 639601: Use substitution to solve for x1 and y1
y=x2
y=6x-5
i already figured out that x2=5 and y2=25. and yes i am sure those are correct
Click here to see answer by solver91311(24713)

Question 639867: The equation of another line ST passes through the point (5, 0) and is parallel to a line with gradient of -2.
f) Find the equation of the line ST.

Click here to see answer by lwsshak3(11628)

Question 639799: Explain what the domain of a graph is? Be very specific.
Click here to see answer by neatmath(302)

Question 639777: please explain "each set of ordered pairs represens a function. Whrite a rule that represens the function "
(0,1), (1,3), (2,9), (3, 27), (4, 81)
Click here to see answer by neatmath(302)

Question 639784: what is the domain and range of the relation and state whether or not the relation is a function {(3,9) (3,10) (3,11) (3,12)}
Click here to see answer by neatmath(302)

Question 639976: f(x)= 14+8/x;g(x)=8/x
Click here to see answer by lynnlo(4176)

Question 640274: What is the domain and range for this equation... (2)/(x^(2)+49)??
Click here to see answer by solver91311(24713)

Question 640281: f(2)=36 and f(-4)=f(0)=F(3)=0 expression for cubic funtion

Click here to see answer by solver91311(24713)

Question 640265: if f(x) = x^3, evaluate the difference quotient of (f(2 + h) - f(2)) / h and simplify.
Click here to see answer by solver91311(24713)

Question 640542: 5x^2/x^2+2 Can you please help me find the domain of this problem in interval notation?

Click here to see answer by lwsshak3(11628)

Question 640597: Please help me find the domain of this function
f(x)=5x^3-5x

Click here to see answer by jim_thompson5910(35256)

Question 640769: determine the domain and the range of the function of f(x)= 3x -2
Click here to see answer by MathLover1(20850)

Question 640829: What is the domain of f(x) = 2^x ?
Click here to see answer by jim_thompson5910(35256)

Question 641163: How do I find the domain of 5x-3x-7?
Click here to see answer by jim_thompson5910(35256)

Question 641379: trying to create a formula for the following function table: x=1,2,3,4 and y=20,16,12,8. Appreciate any help, thank you!
Click here to see answer by jim_thompson5910(35256)

Question 641398: Perform the requested operation or operations. f(x) = 4x + 6, g(x) = 5x2
Find (f + g)(x).

Click here to see answer by jim_thompson5910(35256)

Question 641783: What is the domain of the function f(x)=x-6?
Click here to see answer by MathLover1(20850)

Question 641941: slope for y=-3/7

Click here to see answer by jim_thompson5910(35256)

Question 641973: Evaluate the function f(x)=2x^3 - 6x + 1 for f(2).
I got 5, but the textbook says -3. If anyone could clear up if I'm right in this situation, or where I probably went wrong, I'd be thankful. :)
Click here to see answer by jim_thompson5910(35256)

Question 642079: if f(x)=x^2 and g(x)=1-5x, find (fog)(x)
Click here to see answer by solver91311(24713)

Question 642165: f(x)= √(x-6) and g(x)= x/x-3
Find the domain of (f.g)(x)
Find the domain of g(x)
find the domain of f(x)
Click here to see answer by lwsshak3(11628)

Question 642273: (2a-4)+(5a+9) simplify
Click here to see answer by lynnlo(4176)

Question 642520: so the problem says each person in the united states produces about 3.5 pounds of trash a day.
then
write an expression to describe the pounds of trash per day by a family with m members.
then
use the expression you wrote to predict the amount of trash produced by a family of four each day.
so will you help me solve this problem please.
Click here to see answer by Century(7)

Question 642640: Given: f(x) = x2 + 2x + 1, find f(x + h) and simplify
Click here to see answer by jim_thompson5910(35256)

Question 642640: Given: f(x) = x2 + 2x + 1, find f(x + h) and simplify
Click here to see answer by MathLover1(20850)

Question 642585: Determine whether the equation represents y as a function of x.
x^2+y^2=4
Click here to see answer by KMST(5328)

Question 642925: Evaluate f(x) = -2x-5 for x=3
Click here to see answer by jim_thompson5910(35256)

Question 642926: Is the relation {(1,3),(-4,0),(3,1),(0,4),(2,3)} a function? Why or why not?
Click here to see answer by jim_thompson5910(35256)

Question 642929: Write an equation of the direct variation that includes the point (9,-12).
Click here to see answer by Edwin McCravy(20056)

Question 642920: Write a function rule for the table.
X. F,(x)
0 3
1 4
2 5
3 0
Click here to see answer by Edwin McCravy(20056)

Question 643017: i don't really know how to explain the question so i will write it out.
Consider the function below, f(x).
how do i evaluate f(0) using the graph
Click here to see answer by solver91311(24713)

Question 643258: What is the rule for the domain and range, which the domain is 0,1,2,3 and the range is 1,1.5,2,2.5? y=?
Click here to see answer by stanbon(75887)

Question 643382: Given the following function find f(-1), f(0), and f(2)
f(-1) =
f(0) =
f(2) =
I keep getting this wrong. But it wont tell me which one of the three answers is wrong
Click here to see answer by MathLover1(20850)

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