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

Tutors Answer Your Questions about Functions (FREE)

Question 53721: 3x+2y=51
13=20x-5y
3y=-4x+2
Click here to see answer by rchill(405)

Question 54141: Question-- let f(x)= x2 +3x - 1 and g(x) = x - 1 find and simplify (f o g) (x)
What i have so far:
g(-1) = -1 - 1 = 0
f(0) = (0) squared + 3 (0) - 1 = -1

Is this correct???
Click here to see answer by funmath(2925)

Question 54138: Write an equation for each function in the form f(x)= mx+b.
16. f(3)=9, f(5)=15
17. f(-2)=4, f(2)=-16
18. f(0)=5, f(-5)=10
19. f(10)=4, m=1/2
Click here to see answer by tiffanyc(9)

Question 54173: If the revenue function for a noodle bowl stand is r(x)= 33/16x-42 and the cost function is c(x)=33/32x+47, how much profit (or less) will be generated each hour when 95 noodle bowls per hour are produced and sold?

Thanks so much for any help. I can't figure out how to set it up to get to the answer.
Thanks for any help you can provide.
Click here to see answer by stanbon(57219)

Question 54174: Thank you.
Click here to see answer by stanbon(57219)

Question 54176: Over what interval is the following piecewise function increasing?
{-1-x for x<-2
f(x) {3x+7 for -2less than/equal to x less than/equal to -1
{ 1 for x > -1
Click here to see answer by stanbon(57219)

Question 54185: I am not clear about functions, so I need help figuring this out. Could someone please help?
Which of the following is not a function of x?
y=x^2+5x+3
y-3=6x
6x= -y^2+3
0=5x-y+1
Click here to see answer by funmath(2925)

Question 54214: Solve and check.
x+1/6 = 4/3
Click here to see answer by funmath(2925)

Question 54213: 2x/7 + 3x/2 = 25/7
Click here to see answer by funmath(2925)

Question 54213: 2x/7 + 3x/2 = 25/7
Click here to see answer by checkley71(8403)

Question 54241: The function y=2x^2+x+3 has a minimum value....is that correct?
yes
Click here to see answer by stanbon(57219)

Question 54241: The function y=2x^2+x+3 has a minimum value....is that correct?
yes
Click here to see answer by ceforest(1)

Question 54242: Is it true that relations that are symmetric about the x-axis only are neither even nor odd?
Click here to see answer by stanbon(57219)

Question 54239: If a parabola is facing up on a graph it has a positive discriminant. Is that correct?
Click here to see answer by stanbon(57219)

Question 54303: The question is
Rewrite the equation in function form
and the first problem is...
-2x+y=6

Click here to see answer by Cintchr(481)

Question 54215: Use the five-step method to solve.
One-third of a number is 5 less than half of the same number. What is the number?
Click here to see answer by jainenderkapoor(61)

Question 54336: Simplify
(a^2b^0c)^0
Click here to see answer by funmath(2925)

Question 54333: x/5 - x+2/3 = 1/15
Click here to see answer by funmath(2925)

Question 54332: Solve and check.
3a/7 = -2/5
Click here to see answer by rchill(405)

Question 54210: Define the following:
a proportion is a(n)____________
Click here to see answer by funmath(2925)

Question 54383: I have two questions I'm stumped on. One is Suppose the rectangular TV screen measures 50" on the diagonal and 30" in height. What is its width?
The other is The speed of light is approx 3 x 10^5 km/sec. Write an equation which is a function of distance y and time x.
Click here to see answer by Nate(3500)

Question 54438: Solve using matrices
2x-3y=4
5x+4y=33
Click here to see answer by tiffanyc(9)

Question 54437: Consider the parabola through the points (1,5), (2,11), and (3,-3).
i) Find the equation for the parabola y = ax² + bx + c.
ii) Find the vertex.
iii) find the x-intercepts.
iv) Find the y-intercept.
Click here to see answer by Edwin McCravy(8880)

Question 54425: find the domain.
f(x)=sqrt(x+4), g(x)=x^2
Click here to see answer by venugopalramana(3286)

Question 54466: Simplify.
(3/5)^-3
Click here to see answer by funmath(2925)

Question 54465: Simplify.
a^-3b^2
Click here to see answer by funmath(2925)

Question 54464: 2.4x - 1.2x = 4.8
Click here to see answer by tutorcecilia(2152)

Question 54463: The first step in solving equations with fractional coefficients is to multiply both sides of the equation by the ________________ of the denominators.
Click here to see answer by tutorcecilia(2152)

Question 54462: Solve and check.
24/x-3 = 72/x+3
Click here to see answer by tutorcecilia(2152)

Question 54496: please evaluate
f(x)=-5x+8 at f(-3)
Click here to see answer by checkley71(8403)

Question 54517: Can you help me on these two questions? If
f(x)=7, x= ?
f(x)-6, x= ?
Click here to see answer by rchill(405)

Question 54493: Evaluate
f(x)=3x^2-4x-3 at f(x-1)
am i posting this question in the right place?
Click here to see answer by Nate(3500)

Question 54491: Solve the equation
a + b + c = 5
4a + 2b + c = 11
9a + 3b + c = -3

Click here to see answer by Nate(3500)

Question 54495: determine wheather the given function is even, off, or niether, thank you
f(x)=x^3-5x
Click here to see answer by Born2TeachMath(20)

Question 54494: determine wheather the given function is even, odd, or neither....thanks
f(x)=5x^2+x^4
Click here to see answer by Born2TeachMath(20)

Question 54586: use the given conditions to write an equation in the point-slope form and the slope-intercept form
slope = 8, passing through (4, -1)
Click here to see answer by venugopalramana(3286)

Question 54585: use the given conditions to write an equation in the point-slope form and the slope-intercept form
slope=4, passing through (1, 3)
Click here to see answer by venugopalramana(3286)

Question 54584: PLEASE HELP ME WITH THIS PROBLEM:
FIND THE VERTICAL ASYMPTOTE OF THE RATIONAL FUNCTION f(x) = 3x-12 over 4x-2
Click here to see answer by venugopalramana(3286)

Question 54583: PLEASE HELP ME WITH THIS PROBLEM:
FIND THE HORIZONTAL ASYMPTOTE OF THE RATIONAL FUNCTION f(x)= 8x-12 over 4x-2
Click here to see answer by venugopalramana(3286)

Question 54567: Im not understanding this function stuff. Can someone please explain it to me. Here is an example problem. y^2=x+1 I know that you enter a number into one of the variables and solve for the other variable, but Im not sure what makes a problem like this functional or non functional.
Click here to see answer by venugopalramana(3286)

Question 54656: Solve each of the following inequality. Express your final answer using inequality.
-22<2z-4<0
Click here to see answer by tutorcecilia(2152)

Question 54661: Solve each of the following inequality. Express your final answer inequalities.
[x/8+5]>5
Click here to see answer by eaosmartchik202(2)

Question 54753: Prove Analytically that f(x)=x^3-4x is odd.
Prove Analytically the f(x)=x^4+2x^2+5 is even.
Write the equation for a function that has a graph with the shape of y=square root of x, but is reflected in the y-axis and shifted up 12.
Write the equation for a function that has a graph of y=x^2, but is vertically shrunk by a factor of 0.2 and shifted left 15 units.
Click here to see answer by funmath(2925)

Question 54736: If f(–x) = –f(x) for all choices of x, then what does that tell you about the function f?
Give an example of a function that has this property f(–x) = –f(x) for all real numbers x.
Click here to see answer by psbhowmick(529)

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