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Tutors Answer Your Questions about Functions (FREE)
Question 57239: the period of a simple pendulum is directly proportional to the square root of it's length. if a pendulum has a length of 6ft and a period of 2 sec, to what length should it be shortened to achieve a 1 second period?
Click here to see answer by aaaaaaaa(138)  |
Question 57305: Direct variation: true or false
If you triple an x-value of a direct variation, the y-value also triple.
true of false?? Explain.
I put true becausein y=kx, lets say y=2,k=1,and x=3. If the 3 is tripled, it would become 9, causing the y (or 2) become 6 and also triple. Is this correct???
Click here to see answer by funmath(2925) |
Question 57304: this question has to do with direct variation:
The graph of a direct variation may pass through (-2,4)
True or false. Explain
I think its true because couldn't direct variations be any ordered pairs but 0?? Could I get confirmation on this?
Click here to see answer by stanbon(57250) |
Question 57463: Can someone please help me on the following problem?
I need to evaluate this function for the value specified.
f(x) = x^2 - 7x + 10; find (a) f(0), (b) f(5), and (c) f(-2).
Thank you,
sher
Click here to see answer by rcmcc(152)  |
Question 57469: Can someone help me on this problem?
If the inventor charges $4 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?
(c) What is the break-even point for sales?
Thanks,
Ashley
Click here to see answer by Nate(3500) |
Question 57476: 1). If f(x) =2x2+1 and g(x)=x-3, find (f o g)(x).
a. (f o g)(x) = 2x 2 - 17
b. (f o g)(x) = 2x 2 - 12x + 19
c. (f o g)(x) = 2x 2 - 2
d. (f o g)(x) = 2x 2 - 12x + 13
2). Is the graph of y=x2+5 symmetric with respect to the origin, the x-axis, the y-axis, or the line y = x?
a. the x-axis
b. the y-axis
c. the origin
d. the line y = x
Click here to see answer by funmath(2925) |
Question 57593: My question is not in my book, it is on a hand out.
The question is......
find the slope and y-intercept of the line given by 2x-3y=5
I came up with y=-2/3x+5....is this the correctanswer -2/3;(0,-5/3)
Click here to see answer by stanbon(57250) |
Question 57731: The question says find the domain of (-2,-1,0,2,5)
1.y=3x+2
does that mean replace x with each of the numbers in parenthasis? Wouldn't that be solving for x? Can domains be negative? How would you express the answer? In parenthasis with each answer seperated by a comma?
Click here to see answer by stanbon(57250) |
Question 57793: Given f(x)=(x+1)^2(x-1)(x+2)(x+4)^3
a.) Find the x- and y- intercepts of f.
b.) Determine whether the graph touches or crosses the x-axis at each x-intercept. How do you do this without graphing f?
c.) What power function does f resemble for very large values of |x|?
Click here to see answer by stanbon(57250) |
Question 57795: The owner of a video store has determined that the cost C, in dollars, of operating the store is approximately given by C(x) = 2x^2 - 28x + 560, where x is the number of videos rented daily. Find the lowest cost to the nearest dollar.
Click here to see answer by phillv(13) |
Question 57880: Can someone help me on this problem?
I need to evaluate the function on this problem for the value specified.
f(x) = x^2 - 7x + 10; find (a) f(0), (b) f(5), and (c) f(-2).
Thanks so much,
Sher
Click here to see answer by rcmcc(152) |
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