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

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Question 48234:
Click here to see answer by atif.muhammad(135)

Question 48544: Given f(x) = 4x � 5, find f(a � 1).
A) 4a � 9
B) 4a � 6
C) a � 2
D) a � 9
PLEASE HELP THIS OLD LADY OUT...SHE IS DESPERATE???!!! THANK YOU
Click here to see answer by cowess(34)

Question 48547: I have a table that has the following values for x, f(x) & g(x):
x ---| 1,2,3,4,5
f(x)-| 5,3,5,1,2
g(x)-| 4,5,1,3,2
From the information a from the the table above, providing values for f(x) and g(x) evaluate (fog)^-1(3)
the choices I have are:
a. 1
b. 2
c. 4
d. 5
Thank you very much for you help in advance.
Click here to see answer by stanbon(75887)

Question 48545: Please help me work out this problem.
For the function defined by f(x)=2-x^2, 0<=x, use a sketch to help find a formula for f^-1(x).
My possible answers to choose from are:
a. f^-1(x)=x^2-2, x<=2
b. f^-1(x)=1/2-x^2, 0<=x
c. f^-1(x)=sqrt2+sqrtx, 0<=x
d. f^-1(x)=sqrt 2-x, 0<=2
Click here to see answer by stanbon(75887)

Question 48716: Solve:
10x - 1/4 = 9x + 3/8
Click here to see answer by checkley71(8403)

Question 48718: Solve:
3x - 7 = 2x + 8
Click here to see answer by checkley71(8403)

Question 48718: Solve:
3x - 7 = 2x + 8
Click here to see answer by tutorcecilia(2152)

Question 48724: Solve:
4(7x + 10) = 3(9x - 5) + 20
Click here to see answer by stanbon(75887)

Question 48839: I am not stupid but these two problems have me stumped... any help is appreciated
given g(x)=4x-3, find g(3a). HELP ME PLEASE
given f(x)=x^2 - x+7, find f(0)
Click here to see answer by atif.muhammad(135)

Question 48840: solve the system by addition
5x - 3y = 13
4x - 3y = 11
Please help Thank you
Click here to see answer by checkley71(8403)

Question 48877: Solve the system by addition or substitution.
3x + 6y = 0
x = 2/3

Click here to see answer by cowess(34)

Question 48876: f (x) = x2 - 7x + 10; find (a) f (0), (b) f (5), and (c) f (-2)
Click here to see answer by gsmani_iyer(201)

Question 48895: please help! I have been looking at this question for just over a week and ive put it off and done my others now this is one of the last ones!
let p : N x N --> N be the function defined by
p(m,n) ={1 if n=0;
m * p (m, n-1) otherwise;)
what is the value of p (2, 3)?

Click here to see answer by alka001(14)

Question 49038: 2/3m= 1/2
Click here to see answer by ikdeep(226)

Question 49039: 7-1/2x=3
Click here to see answer by AnlytcPhil(1806)

Question 49058: Find the x-intercept for y=x^2+x-6
Click here to see answer by tutorcecilia(2152)

Question 49118: Evaluate function for the value specified.
f(x )=x to the 2nd power-7x+10; find (a) f(0) (b) f(5) and (c) f(-2)
I do not understand what they are asking on this practice question.
Click here to see answer by Born2TeachMath(20)

Question 49131: I have a word problem that I have been working on that I am not getting.
A manufacturer of compact stereos believes that the revenue the company receives is related to the price (p) of a stereo by the function R(p)= 180p-1/3p^2. What price will give the maximum revenue, and what is the maximum revenue? So what I am wondering is..... Do I just plug in different prices? I have done this, but I just kepp getting higher numbers. When do I know I have the max number? I was hoping it would just finally go into the negative, but it does not. so..... Any ideas?
Click here to see answer by venugopalramana(3286)

Question 49122: the inventor of a new product believes that the cost of producing the product is given by the function
C(x)=1.75x +7000
If the inventor charges $4.00 per unit, then her profit for producing and selling x units is given by the function
P(x)=2.25x-7000
a) what is her profit if she sells 2000 units
b)what is her profit if she sells 5000 units
what is the break even point for sales.
Please help
Click here to see answer by venugopalramana(3286)

Question 49119: rewrite the following equation as a function of x
-3x + 4y=11
Click here to see answer by venugopalramana(3286)

Question 49103: How do you figure out functions?
Click here to see answer by longjonsilver(2297)

Question 49095: I have to find the value of f(x)=3x-5
and f(a) so it would look like 3(a)-5 but i dont know how or if i can simplify

Thank you!
Click here to see answer by tutorcecilia(2152)

Question 49170: How would you factor these four problems:
1) x2- 64
2)x4-y4
3)x2-7X+10
4)2X2- 5x-3
Click here to see answer by Nate(3500)

Question 49168: 3/7(14x-21)=1/2(6x+40) Please Answer as quick as you can. I get some but not all.
Click here to see answer by tutorcecilia(2152)

Question 49176: I have a question: how do u solve the ones below?
1) x^2+7x+10
2) 2x^2-50
Click here to see answer by tutorcecilia(2152)

Question 49120: if f(x)=4x-3 find the following f(-1)
Click here to see answer by Nate(3500)

Question 49087: 56/6+2/1=7 Insert paranthesis to make the answer equal zero
Click here to see answer by josmiceli(19441)

Question 49245: if x=5 and y=3, then 4x-2y=?
Click here to see answer by TheAntiheroX9(4)

Question 49189: Please help me solve this equation: h(x)=x^2+5x-6/x+3
H(2a)
Click here to see answer by Nate(3500)

Question 49243: (10x15)+(6x+25)=180
Click here to see answer by ikdeep(226)

Question 49329: I am running out of time to finish my summer work, and yet I still do not know how to solve these problems:

"What values are excluded from the domain of the function?"

f(x)= 1/x-1 (one over x minus one)

another is f(x)= 3x+2

A friend of mine who is doing the same work told me to plug 0 in for x, but I am still not sure.
Click here to see answer by jake_6233(74)

Question 49332: Could someone please tell me why function notations might be important. the reasons for function notation?
Click here to see answer by jake_6233(74)

Question 49234: i need help with number 2 which is 4(8-2
______
3+9
Click here to see answer by tutorcecilia(2152)

Question 49403: a mechanic charges a diagnostic fee of $ 35, plus $42.50 per hour for labor. If ur bill on ur car repair was $268.75 without parts, how many hours did the mechanic work on ur car?
Click here to see answer by Nate(3500)

Question 49599: 3a/4 + 7/6 = -a + 7/24
need help solving this one please
Click here to see answer by Earlsdon(6294)

Question 49755:
if f(x)=3x+1,and g(x)=(x²+5x)^-1/2,find g(f(x))

Click here to see answer by AnlytcPhil(1806)

Question 49869: f(x) 0 1 -1 2
____________________
x 2 3 3 4
A) state the domain
B) state the range
C) determine whether f(x) is a function
Click here to see answer by stanbon(75887)

Question 49891: Will this be considered a FUNCTION,
INPUT | 1 | -1 | 2 | -2 | 3 |
OUTPUT| 1 | -2 | +/-5 | -6 | 8 |
Click here to see answer by venugopalramana(3286)

Question 49892: Find four differant numbers from the domain that produce the same output
Annual Income |Less than $2000|$2000 - $6000|$6001 and more|
Amount of Tax | 0% | 2% | $80+5% |
Click here to see answer by stanbon(75887)

Question 49975: Given f(x) = 4x + 4, find f(0)
Click here to see answer by stanbon(75887)

Question 49973: Given f(x) = x2 � x + 7, find f(0)
Click here to see answer by stanbon(75887)

Question 49971: Are the following lines parallel, perpendicular, or neither?
L1 with equation x � 6y = 30
L2 with equation 6x + y = 6

Click here to see answer by tutorcecilia(2152)

Question 49972: Given g(x) = 4x � 3, find g(3a)
Click here to see answer by tutorcecilia(2152)

Question 49972: Given g(x) = 4x � 3, find g(3a)
Click here to see answer by Earlsdon(6294)

Question 49969: given f(x)=5x to the second power-3x +1, find f(-2)
Thank you!
Click here to see answer by tutorcecilia(2152)

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