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

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Question 49970: Given f(x) = 4x � 5, find f(a � 1)
Thank you
Click here to see answer by tutorcecilia(2152)

Question 49967: Please help rewrite the equation -x-10y=50 as a function of x
Click here to see answer by tutorcecilia(2152)

Question 50115: Simple Function Evaluation:
f(x)=1/3x5(power of 5), find f(3)
Please help. I cannot get this one!
Click here to see answer by tutorcecilia(2152)

Question 50219: I need the domain and range of f(x)=20x^2-6
Click here to see answer by stanbon(75887)

Question 50214: determine domain of :
y = square root of (x^2-16)
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Question 50237: Hi can anyone help with this question
the domain of the function h(x)=3x over x(x^2-81)
Is the answer{x|x does not equal plus or minus9 and x does not equal 0}
Thanks. I've also tried to contact some tutors about paying for some help but the email addresses keep bouncing back
Click here to see answer by stanbon(75887)

Question 50245: Hi, Do the x^3's cancel each other out in the following equation?
3+6x^2 over x^3 times x^3 equaling 3+6x^2 Thanks
Click here to see answer by tutorcecilia(2152)

Question 50263: I attempted to solve this equation and came up with 4. Is this correct?
Solve the equation 4^2x+1 = 2^3x+6.
Click here to see answer by Nate(3500)

Question 50327: what is the domain of F in the problem F(x)= the square root of (2x+3)
Click here to see answer by AnlytcPhil(1806)

Question 50317: what is the domain relation of (-2,-2), (-1,-1), (0,0), (1,1), (2,2)
Click here to see answer by rapaljer(4671)

Question 50372: What is the minimum of the function x^2+4x+2?
Click here to see answer by stanbon(75887)

Question 50433: Re-post: Need your help???
For the function defined by f(x) =5x-4, find a formula for f^-1(x).
Click here to see answer by venugopalramana(3286)

Question 50480: Please help me solve this equation:
Click here to see answer by tutorcecilia(2152)

Question 50050: Two algebra classes took the same test. The mean (average) of the first class of twenty students was 90 percent. The average of the second class was 75 percent. If the average grade for the combined classes was 81 percent, how many students were in the second algebra class?
Click here to see answer by venugopalramana(3286)

Question 50498: Find the domain for:
h(x)=the square root of 2x-3 >>>>>didn't know how to input this
Click here to see answer by Nate(3500)

Question 50496: Given k(x)=-5x-6
Find K(3)-K(x)/5
I have no idea ....please help!!!
Click here to see answer by Nate(3500)

Question 50506: Greetings, I need some help and the system for figuring out the below problem.
Question: From the information in the table providing values of f(x) and g(x), evaluate (f of g)^1 (3).
The table looks like this...

x 1 2 3 4 5
f(x) 5 3 5 1 2
g(x) 4 5 1 3 2

Click here to see answer by stanbon(75887)

Question 50495: Find the composite function:
f(2)for f(x)= 7x+1, if x<1
2x, if 2 less than or equal to x less than or equal to 7
2-5x, if x>7
Click here to see answer by stanbon(75887)

Question 50415: How do you know what number to substitute for x in a function?
example: f(x)=4-9x+3x^2
Click here to see answer by rapaljer(4671)

Question 50590:
Click here to see answer by Mikemighty(1)

Question 50609: 14. f(x) = 13x - 10
g(x) = -12x^3 + 11x^2 - 12x - 11
find f(g(3))
Click here to see answer by stanbon(75887)

Question 50666: Given f(x) = 5x + 3, find f(0)
Click here to see answer by rapaljer(4671)

Question 50604: I have a pattern problem that I just cannot figure out. It is an in/out pattern box. I must find a rule/formula that will fit each value in the boxes.
It apears as though -4 must be used in the formula. Here are the #s in the IN box 3, -5, 1/3, 0, 7, -2. The #s in the out box are 5, 21, -3 8/9, -4, 45, 0.
I assume I must come up w/ some multiplier ???? time my number in the in box eqauls my number in the out box. I have worked on this problem for two days and cannot find a number (s) that will work. Thanks for any assistance rendered.
Click here to see answer by stanbon(75887)

Question 50695: If f(x)=X^2+2 and g(x)=2*x-1,
find f(g(1)).
Thanks,
Carolyn
Click here to see answer by venugopalramana(3286)

Question 50724: List the domain for the function {(-2,3), (-1,5), (0,7), (1,9)}.
List the domain for the function f(x) = x2 - 4
Evaluate the function g(x) = x2 - 5x + 2 for x = 1.
For the function f(x) = 3x + 2, find f(x+h).
Click here to see answer by stanbon(75887)

Question 50737:
Help! PAGE 131 #19 Find and simplify the difference quotient: f(x + h) - f(x) -----------------, h does not = 0 h for the given formula: f(x) = 1/x

Click here to see answer by AnlytcPhil(1806)

Question 50808: 6 - 5[8-(2y-4)]
can you help me? I am not sure if the brackets are multiplied or not.
I came up with -54-10y and 8-(2y-4)
Click here to see answer by tutorcecilia(2152)

Question 50808: 6 - 5[8-(2y-4)]
can you help me? I am not sure if the brackets are multiplied or not.
I came up with -54-10y and 8-(2y-4)
Click here to see answer by stanbon(75887)

Question 50842: Find each of the following for the given function
f = {(2,3),(5,1),(8,2),(-2,-4)}
a} f(8)= ___
b) f(__) = 1
c) f(-2)=____
Click here to see answer by stanbon(75887)

Question 50867: please help.
Write the expression
9x^2-9x+1
in the form a(x+b)^2+c, where a, b and c are real numbers.
Click here to see answer by AnlytcPhil(1806)

Question 50896: Suppose f(x)= 4x-10.Evaluate each of the following.
1. f(2x) 2. f(n) 3. f(-3y) 4. f(t+1) 5. f(t-1)

6. f(r+2) 7. f(c+10)
Click here to see answer by sinadone(8)

Question 50932: what is the domain of y=sq.root of (9-x^2) i htink the answer may be x is less than or equal to 3 that is what i got when i worked it out
Click here to see answer by stanbon(75887)

Question 50934: 1. Find the equation of the line passing through the point (3,4) that is perpendicular to the line passing through the points (7,9) and (8,1). Put the answer in point slope form.
2. Put the equation from problem 1 in slope-intercept form
3. Put the equation from problem 1 in standard form
4. Find the x and y- intercepts of the line you found in problem 1
Click here to see answer by stanbon(75887)

Question 50948: I can't figure this problem out.
3x-2y if x=-2 and y=-6
Click here to see answer by AnlytcPhil(1806)

Question 51030: I can't figure this out
-8(2y-4)=9(4-2y)
Click here to see answer by junior403(76)

Question 51028: I just don't understand these
-2-4(2y-1)=(6-2y)3
Click here to see answer by junior403(76)

Question 51042: Determine whether f(x) = 2x and g(x) = 0.5x are inverses of each other.
a. Yes
b. No
Click here to see answer by stanbon(75887)

Question 51040: If f(x) = (x - 2)^1/3, then f^-1(x) =
a. (x3 + 1)/2
b. (x3 - 1)/2
c. (x3 + 2)/2
d. (x3 - 2)/2
e. x3 - 2
f. x3 + 2
g. none of these
Click here to see answer by stanbon(75887)

Question 51040: If f(x) = (x - 2)^1/3, then f^-1(x) =
a. (x3 + 1)/2
b. (x3 - 1)/2
c. (x3 + 2)/2
d. (x3 - 2)/2
e. x3 - 2
f. x3 + 2
g. none of these
Click here to see answer by Earlsdon(6294)

Question 51041: A strong spring is mounted to a steel I-beam so that the spring hangs vertically. A weight is hung from the spring. The energy P (arbitrary units) stored in the spring is given by P(x) = 2x^2, where x is the distance in inches that the end of the spring is stretched from its equilibrium position. Find P(4).
a. 4 units
b. 16 units
c. 8 units
d. 32 units
Click here to see answer by stanbon(75887)

Question 51022: Please help...
5(x-7)=2(2-2x)-3
Click here to see answer by checkley71(8403)

Question 50971: i would like to know how to do step by step
find f(a+h)-f(A)/h
14. F(x) = 4x+5
Click here to see answer by venugopalramana(3286)

Question 51205: Determine whether the set S = {( �3, 1), (�2, 1), (�1, 0), (0, 1)} defines a function. If it does, then state the domain and range.
a. S does not define a function.
b. S defines a function with domain { �3, �2, �1, 0} and range {0, 1} .
c. S defines a function with domain {0, 1} and range { �3, �2, �1, 0} .
d. S defines a function with domain {( �3, 1), (�2, 1), (�1, 0), (0, 1)} and range { �3, �2, �1, 0} .
Click here to see answer by THANApHD(104)

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