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

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Question 669504: f(x)=8x+9, g(x)=x^2+7x find (fg)(2)
Click here to see answer by ewatrrr(24785)

Question 669648: Which of these defines a function?
1. x^2+y^2=49
2. x=|y|
3. y=[x]
4. x=y^2/8
Click here to see answer by DrBeeee(684)

Question 670063: Use the function to answer the question.
f(x) = 4x-8
What is the value of f �1(�2)?
Click here to see answer by stanbon(75887)

Question 670138: Assume f(x) = x^2 + 4 find the functional value (f-6)
f(-6) = -6^2 + 4
f(-6) = 36 + 4
f(-6) = 40
I keep getting -36 for -6^2
or f(-6) = -32
Click here to see answer by ewatrrr(24785)

Question 670352: 3x-1=5(x-1)-2(7-2x)
Click here to see answer by rfer(16322)

Question 670590: solve n check. 3/1-x = 4/1+x
Click here to see answer by ewatrrr(24785)

Question 670589: 2y/y(y-1) + 3/y-1 simplify n leave in factored form.
Click here to see answer by ewatrrr(24785)

Question 670587: 16a^2/4a+9b - 81b^2/4a+9b simplify
Click here to see answer by ewatrrr(24785)

Question 670585: 5x^2-15x/8x-7 / x-3/8x-7 divide n simplify
Click here to see answer by ewatrrr(24785)

Question 670588: least common multiple. x^2-9x, x^2+9x
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Question 670591: M= gs/g+s solve for s
Click here to see answer by Alan3354(69443)

Question 670716: Which equation could represent "the area of a square as a function of a side"?
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Question 670758: The ordered pairs (1, 25), (2, 36), (3, 49), (4, 64), and (5, 81) represent a function. What is a rule that represents this function?
THANK YOU SO MUCH!
Click here to see answer by jim_thompson5910(35256)

Question 670883: Use the Laws of Logarithms to expand the expression.
ln sqrt 9r^8s.... instead of a regular sqrt its a cubed root but its not a 3 its 4.Its the sqrrot sigh with a little 4
Click here to see answer by stanbon(75887)

Question 670906: Evaluate the function.
p(n)= 2^n; find p(-2)
Click here to see answer by stanbon(75887)

Question 670906: Evaluate the function.
p(n)= 2^n; find p(-2)
Click here to see answer by ReadingBoosters(3246)

Question 670916: let f(x) = -4 +8. write the rule for a new function g(x) as a vertical translation of f(x) three units down
Click here to see answer by Alan3354(69443)

Question 671131: Determine the solution set for the following equation if the replacement set is {3, 5, 7}. 9 + x = 14
Click here to see answer by mananth(16946)

Question 671172: Start with the graph of .
Reflect it across the x-axis. Translate it 3 units up.
State the equation, domain, and range.

Click here to see answer by MathLover1(20849)

Question 671224: Find a polynomial f(x) of degree 4 that has the following zeros.
-1, 3 , -2 , 0
Leave your answer in factored form.

Click here to see answer by Alan3354(69443)

Question 671722: I dont seem to understand what give the domain and the range of each function please explain what i do if it shows a table x,y
1, 27
4, 39
8, 50
14, 62 ???
_HElp please
Click here to see answer by BedrockFist(9)

Question 671240: Which of the following relations is a function? A. { (1, 2), (1, 3), (1, 4), (1, 5) } B. { (1, 3), (2, 3), (4, 3), (9, 3) } C. { (5, 4), (-6, 5), (4, 5), (4, 0) } D. { (6, -1), (1, 4), (2, 3), (6, 1) }
Click here to see answer by BedrockFist(9)

Question 671775: let f(x)=x^2-1 and g(x)=2x-3. find the new function and write it in simplest form.
Click here to see answer by ewatrrr(24785)

Question 671844: what is the inverse function of -1/(x+3)
so y= -1/(x+3)
Click here to see answer by ewatrrr(24785)

Question 671877: What is the slope of the line that passes through the points (�2, 5) and (1, 4)?

Thank you very much!!!
Click here to see answer by jim_thompson5910(35256)

Question 671877: What is the slope of the line that passes through the points (�2, 5) and (1, 4)?

Thank you very much!!!
Click here to see answer by VirtualMathTutor(26)

Question 671881: A line has slope �5/3. Through which two points could this line pass?
It's confusing to me so thank you so much!
Click here to see answer by ewatrrr(24785)

Question 671881: A line has slope �5/3. Through which two points could this line pass?
It's confusing to me so thank you so much!
Click here to see answer by ReadingBoosters(3246)

Question 671973: for the equation y2- y1 / x2- x1, does it matter which way you solve it? does the y go first?
Click here to see answer by Alan3354(69443)

Question 672242: if f(x)=1/square root of x-1 and g(x)=x^2+1 evaluate (f+g)(x)
Click here to see answer by MathLover1(20849)

Question 672237: what is the point of a function, when in life will i need them i am having a hard time trying to figure them out
Click here to see answer by stanbon(75887)

Question 672453: 50/(11x-13)Finding the domain of the function is all real numbers except x, find x?
Click here to see answer by ReadingBoosters(3246)

Question 672007: I don't understand the 4-steps to find..
If f(x)= 1/x and g(x)=1/x+2, then:

Answer is: (fog)(x)= x+2, Domain=(-infinity,-2)U(-2,infinity)
Click here to see answer by ReadingBoosters(3246)

Question 671509: Solve the equation so that y is a function of x. 4x+y=-10
Click here to see answer by ReadingBoosters(3246)

Question 672202:
Click here to see answer by ReadingBoosters(3246)

Question 671206: 5x+10=5(x+2)
Click here to see answer by ReadingBoosters(3246)

Question 672581: Find the value of (3*2)-(5*3) if a*b=2^(2a-b).
I don't know what this problem is asking/how to solve it.
Click here to see answer by jim_thompson5910(35256)

Question 672579: If a*b = ab+1 and a#b = a/b+1, then find (3*(4#2))#10.
I am really confused by this because I don't get the pound signs or what this problem even means
Click here to see answer by MathTherapy(10549)

Question 672710: Evaluate the function at the indicated values
f(x)=2|x-1| ; f(-2)
How far did I do
f(-2)=2|-2-1|
=2|-3|

Click here to see answer by jim_thompson5910(35256)

Question 672712: simplify 84/144 to the lowest terms.
Click here to see answer by jim_thompson5910(35256)

Question 672827: Which is the zero of the function f(x)=1/2x-8
Click here to see answer by ReadingBoosters(3246)

Question 672576: I have a problem with doing this question, i have to rewrite it so that y is a function of x:
4x-3(y-2)=15+y
Click here to see answer by ReadingBoosters(3246)

Question 672841: h(x)=4+x/2x+2. Which value of x makes the function defined?
Click here to see answer by ReadingBoosters(3246)

Question 671647: Find the x- intercept of function: g(x) = x^2-9 divided by x^2-7
Click here to see answer by ReadingBoosters(3246)

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