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

Tutors Answer Your Questions about Functions (FREE)

Question 163213: Finding zeros of a function:
f(x) = 1/2x^3 - x
Click here to see answer by orca(409)

Question 163249: x=1/2
f(x)=4x-2
Click here to see answer by edjones(7569)

Question 163248: x=3
f(x)=2x-15
Click here to see answer by KnightOwlTutor(293)

Question 163454: a3-2b3+3a2b2-2b3+4a3
Click here to see answer by KnightOwlTutor(293)

Question 163661: Can I get help with this problem please,
Given f(x)=1-5x and g(x)=x^2-3 find the composite function (fog)(x) and simplify.
Thank you.
Click here to see answer by jim_thompson5910(28715)

Question 163707: 2x+y=5
make y a function of x
Click here to see answer by midwood_trail(310)

Question 163707: 2x+y=5
make y a function of x
Click here to see answer by gonzo(654)

Question 163797: is x+y**2=0 a linear equation
Click here to see answer by jim_thompson5910(28715)

Question 163873: How do you find the domain restrictions when simplifying rational equations?
Click here to see answer by Fombitz(13828)

Question 163985: I'm having a little trouble solving this one.
Given , Determine the domain of the inverse I am getting as the inverse. So the range would be
Am I on the right track here?
Thanks for you help.
Click here to see answer by jim_thompson5910(28715)

Question 164008: Let f(x)=2x+1 and g(x)=x^2+5 Evaluate (f*g)(1)
Click here to see answer by Alan3354(31518)

Question 164127: I need help to solve this please! Much appreciated! Thanks
If f (4)= 0 and f(6) =6, which of the following could represent f(x) and why?
A- x+2
B- x-4
C- 3x-12

Thanks
Click here to see answer by checkley77(12569)

Question 164191: Suppose you are at the gas station filling your tank with gas. The function C(g) represents the cost C of filling up the gas tank with g gallons. Given the equation: C(g)=3.03(g)

Find C(2)
Find C(9)

I have solved as...
C(2)=3.03(g)
C*2-3.03*g=0
is this correct?

C(9)...
C(9)=3.03(g)
c*9-3.03*g=0
Is this correct?

Click here to see answer by aka042(26)

Question 164265: wat is the domain of f(x)=1/x and g(x)=x+3 and f of g of x algebraically?
Click here to see answer by padmameesala(42)

Question 164277: Question: Write a cost function for the problem. Assume that the relationship is linear.
Marginal cost, $40; 70 items cost $3800 to produce
a) C(x)=14x+3800
b) C(x)=40x+1000
c) C(x)=40x+3800
d) C(x)=14x+100

Question: Assume that the sales of a certain appliance dealer are approximated by a linear function. Suppose that sales were $10,500 in 1982 and $67,000 in 1987. Let x=0 represent 1982. Find the equation giving yearly sales S(x).
a) S(x)=11,300x+67,000
b) S(x)=56,500x+10,500
c) S(x)=56,500x+67,000
d) S(x)=11,300x+10,500

Mike
Click here to see answer by watchmath(2)

Question 164281: Determine the linear function whose graph is a line that contain the pionts (-3,-1) and (2, -6)
Click here to see answer by algebrapro18(206)

Question 164354: A local parking garage charges $5.00 for the first hour plus $1.50 for each additional hour or part of an hour. Write a relation as a set of ordered pairs in which the x-value represents the number of hours and the y-value represents the cost for x hours. Use a domain of 1,2,3,4,5. Is this relation a function? Explain
Click here to see answer by stanbon(57967)

Question 164358: I am having a hard time with this problem...can someone please help me out.
I am not sure how to graph this equation.

Graph the equation by plotting points.
y=-4

Click here to see answer by stanbon(57967)

Question 164361: I am having a hard time with this problem...can someone please help me out.
Find the slope and the y-intercept of the line. Write the fractional answer in lowest terms.
y=-4/2x-1/6
the slope is...?
the y-intercept is...?

Click here to see answer by stanbon(57967)

Question 164356: please help me in solving this equation...
*I'm thinking that you are suppose to use the format y=mx+b but I am unsure if this is correct*

Use the graph of the function f to find f(1), f(2), and f(3).
f(1)=
f(2)=
f(3)=

Click here to see answer by Alan3354(31518)

Question 164397: Having some trouble determing if I am right on my graph...
please help me graph this equation
Graph the function on paper
f(x)=4-[x]
Click here to see answer by josmiceli(9817)

Question 164427: Given f(x)=-sqrt(x)+2, determine the domain of f^-1(x)
Click here to see answer by Fombitz(13828)

Question 164428: Given f(x)=-sqrt(1-x), determine f^-1(x)
Click here to see answer by jim_thompson5910(28715)

Question 164428: Given f(x)=-sqrt(1-x), determine f^-1(x)
Click here to see answer by padmameesala(42)

Question 164446: Evaluate the function
Given f(x)=6x2 + 6x + 2 find f(4)
Click here to see answer by jim_thompson5910(28715)

Question 164446: Evaluate the function
Given f(x)=6x2 + 6x + 2 find f(4)
Click here to see answer by padmameesala(42)

Question 164443: find the domain and range of the function
y=x3 + 4
and
y=sq root x - 7
Click here to see answer by the_tutor2008(2)

Question 164473: I need to write as equation and solve.
One month's rent plus half of one months rent equals 1725
THanks
Click here to see answer by checkley77(12569)

Question 164485: what is the domain of p(x)=X2+1
Click here to see answer by themathprof(21)

Question 164561: find the value of x so that (x,12) satisfies y=4x+8
Click here to see answer by checkley77(12569)

Question 164576: Let f(x)=3x and g(x)=4x find each function and its domain
f-g?
I dont get it
Click here to see answer by stanbon(57967)

Question 164465: Suppose that the population of a certain city during a certain time period can be approximated by: P(x)0.1x^5+3.2x^4+5000 where x is time in years since 1960. Find P(13).
(a) 63,766
(b) 59,266
(c) 58,366
(d) 62,066

Click here to see answer by Fombitz(13828)

Question 164658: 4*4
Click here to see answer by checkley77(12569)

Question 164681: Find the range of each function.
1. g:x--> 5x+1, D={-1,o,1}
i do not understand how to do this. please help!
Click here to see answer by gonzo(654)

Question 164745: f(x)=2x-5 A. f(6) B. f(1)
Click here to see answer by Mathtut(3670)

Question 164742: Write the equation in function form.
4x+y=-10
Click here to see answer by checkley77(12569)

Question 164759: state whether each of the following relations is a function. If it is a function, state the independent variable and the correlation between variables.
1. Number of tickets sold for a benefit play and the amount of money made.
Click here to see answer by Earlsdon(6294)

Question 164837: 1. x^3-4=2, 2. And is this how you solve this problem? x3/2=125, x3/2=5^3 (3/2) 2/3=(5 3/1) 2/3 which the answer is 5^2 or write just 25 as the answer? 3. And how do I solve a algerbracially and check your potential solutions: (x)+20-x=0? 4. And if y=(x)-2 how do I feel in the following table for x=0,1,2?
Click here to see answer by MRperkins(300)

Question 164891: How would you find the domain of a function?
Click here to see answer by edjones(7569)

Question 164923: Given the function f(x)=square root of x-4
A.Find f-1(x)
B. Graph f and f-1 in the same rectangular coordinate system
C use interval notation to give the domain and the range of f and f-1
Thanks if anyone can offer me some help on this.
Click here to see answer by Fombitz(13828)

Question 165020:
I am having difficulties on how to work this type of word problem. any help appreciated.
The height s, in feet, of a rock thrown upward at an initial speed of 64ft/sec from a cliff 50 ft. above an ocean beach is given by the function
s(t) = -16^2 + 64t +50, where t is the time in seconds. Find the maximum height above the beach that the rock will attain.
Click here to see answer by nerdybill(7003)

Question 165021:
f(x) = sqrt(2-x). Find the domain and the range, and list the points.
Help appreciated.
Click here to see answer by tutorcecilia(2152)

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