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

Tutors Answer Your Questions about Functions (FREE)

Question 64280: The revenue for a sandwich shop is directly proportional
to its advertising budget. When the owner spent $2000 a month on advertising, the
revenue was $120,000. If the revenue is now $180,000, how much is the owner
spending on advertising?
Click here to see answer by checkley71(8403)

Question 64275: Find the slope of the line through the following pairs of points.
(-5, -3) and (-5, 2)
Click here to see answer by checkley71(8403)

Question 64318: I am suppose to solve the following system but don't know how.
-2x+2y+3z=-7 (1)
x-2y-2z=4 (2)
Click here to see answer by 303795(602)

Question 64317: I have no clue where to begin on this question.
Solve the following system.
3x+2y-2z=12
2x+2y-3z=-6
-x-2y+4z=8
Click here to see answer by venugopalramana(3286)

Question 64262: solve 3[q] - 7 = 8.....
Click here to see answer by tutorcecilia(2152)

Question 64274: y = 2x - 1
Click here to see answer by tutorcecilia(2152)

Question 64388: f(x)=x(x+3)(x-1), use interval notation to give all values of x where f(x)>0?????
here is what I got so far.
x=0, x=-3, x=1
I'm not sure where to go from here??? Some of the answer for example have (-3,0)U(1,0)
?????
Click here to see answer by stanbon(75887)

Question 64384: 5-3x2+8x5-2;28
how do you put these in proper parentheses to make this correct?
Click here to see answer by stanbon(75887)

Question 64426: if f(x)=x(x-1)(x-4)^2, use interval notation to give all values of x where f(x)>0???
I came up with x=0, x=1, x=4 but don't know how to proceed from here
Click here to see answer by stanbon(75887)

Question 64444: I don't get how to solve funtions. I get lost quickly. Any help out there?
Given f(x)=5x^2/x-2

Evaluate f(-1)
Evaluate f(3)
State the domain of function f(x)
thanks!
Click here to see answer by stanbon(75887)

Question 64473: Thank You for your continued help.
Indicate verbally what happens to the parabola f(x)=x^2 in the following instance
- f(x � 5)

Click here to see answer by stanbon(75887)

Question 64471: I need your help
Given f(x) = x^2 + 5 and g(x) = 5x � 2, solve the following functions:
15. f(6)
16. g(-2)

Click here to see answer by stanbon(75887)

Question 64471: I need your help
Given f(x) = x^2 + 5 and g(x) = 5x � 2, solve the following functions:
15. f(6)
16. g(-2)

Click here to see answer by checkley71(8403)

Question 64470: I certainly appreciate the help, less than and greater than i continue to get wrong. Please help me
Solve for x
13. -7 < 2x + 3 < 15
14. -5x +9 > -1

Click here to see answer by stanbon(75887)

Question 64469: Please help me with the folloing problem
Rationalize the following expression
2x+3/√(x)+2

Click here to see answer by stanbon(75887)

Question 64468: Please help
Simplify and use only positive exponents
(3m^-3 n^2 )^-3
Thanks
Click here to see answer by stanbon(75887)

Question 64270: 2x + 3y = 6
Click here to see answer by rchill(405)

Question 64269: y=3/4x+2
Click here to see answer by rchill(405)

Question 64520: Use interval notation to state the domain of the function f(x)=sqrt(x+2)/x-3
Click here to see answer by stanbon(75887)

Question 64479: I really need help on this
Find the equation of the line in slope intercept form given the following:
19.) m = 5 and point (3, -10)
20.) The line runs through (2, 3) and (-3, 7)

Click here to see answer by checkley71(8403)

Question 64478: will you help with a word problem?

My Phone Co, Inc. uses the following price schedule: x < 200 minutes, $.25 per minute; between 201 and 500 minutes, $.15 per minute; Over 501 minutes, $.10 per minute.
How much does 480 minutes cost?

Click here to see answer by checkley71(8403)

Question 64483: I don't even know where to start with this one, looking for help
Solve for x
27.) log x = (2/3) log 8 � (2 log 5 + log 2)
28.) log (x � 1) + log (x � 1) = log 3

Click here to see answer by ankor@dixie-net.com(22740)

Question 64534: Can you help me with these properties? I want to say one of them is communative. What Property is demonstrated by the following statements?
1. uv(w + x) = uvw + uvx
2. a + cb = a + bc

Click here to see answer by Earlsdon(6294)

Question 64536: I don't know where to start for factoring.
Factor the following expressions completely
5. 3m^3 � 18m2 + 15m
6. 2x^3 + 3x^2 - 4x � 6

Click here to see answer by Earlsdon(6294)

Question 64538: I need help. please

Your annuity will be worth $240,000 in 30 years. How much is it worth in today�s money if the average inflation rate is 3% per year?
Click here to see answer by stanbon(75887)

Question 64535: please help me Perform the indicated operations
3. 2y � 3y[4 � 2(y � 1)]
4. (4x � 3y)2

Click here to see answer by checkley71(8403)

Question 64618: Determine, without graphing, whether this function has a maximum or minimum value. Then, find the value: f(x) = 3x2 + 5x � 7
Click here to see answer by 303795(602)

Question 64619: Find the vertical, horizontal, and oblique asymptotes, if any, as well as any holes, of this rational function: R(x)= (2x^2 - 4x^2 + 3x - 6)/(2x^2 - 3x -2)
Click here to see answer by venugopalramana(3286)

Question 64615: Explain what is meant by even and odd functions, and describe an algebraic test to determine whether a function is even or odd.
Click here to see answer by venugopalramana(3286)

Question 64620: Find the inverse of this function, and state the domain and range of both the original function and the inverse: F(x) = sqrt(2x-3)
Click here to see answer by venugopalramana(3286)

Question 64660: Thank you for your help
Solve for x to four decimal places
18. 10x = 153
19. 1.024x = 2

Click here to see answer by tutorcecilia(2152)

Question 64774: Can you please solve this for the indicated operation? Thank you.
(4x � 3y)^2
Click here to see answer by 303795(602)

Question 64831: GIVEN f(x)=5x+7 AND g(x)=x^2+7, FIND (g o f)(x).
Click here to see answer by funmath(2933)

Question 64824: FOR THE FUNCTION DEFINED BY ,, USE A SKETCH TO HELP FIND A FORMULA FOR f^-1(x).
Click here to see answer by funmath(2933)

Question 64862: L has y-intercept (0, -3) and is parallel to the line with equation y=2/3x+1.
Click here to see answer by Edwin McCravy(20054)

Question 64860: Write the equation of the line passing through each of the given pairs of points. Write your
result in slope-intercept form, where possible.
(2, -3) and (2, 4)
Click here to see answer by checkley71(8403)

Question 64857: For the floor plans given in exercise 27, determine whether the side
through the points (2, 3) and (11, 6) is perpendicular to the side through the points
(2, 3) and (-3, 18).
Click here to see answer by checkley71(8403)

Question 64859: Write the equation of the line passing through each of the given pairs of points. Write your
result in slope-intercept form, where possible.
(-1, 3) and (4, -2)
Click here to see answer by checkley71(8403)

Question 64908: 2+5
Click here to see answer by 303795(602)

Question 64918: Please help: Let f(x) = x^2 + 2x-5 and g(x) = x^2 + x. Find (f + g)(x)
Click here to see answer by tutorcecilia(2152)

Question 64858: Write the equation of the line passing through each of the given points with the indicated
slope. Give your results in slope-intercept form, where possible.
(0,5),m=-3/5
Click here to see answer by tutorcecilia(2152)

Question 64957: let y=x^2 and y=5 Graph each pair of functions and the sum of these funcitons on the same set axes.
Click here to see answer by josmiceli(19441)

Question 64963: PLEASE HELP:
Given f(x) = -x-4/-x and g(x) = -4x^2-5x-1 find f(2) and g(-2)
Click here to see answer by funmath(2933)

Question 65003: Please help:
Given f(x) = 3x^2 + x and g(x) = 8, find f(-1) and g(2)
Click here to see answer by checkley71(8403)

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