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

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Question 410676: The linear equation y=0.15x+0.79 represents an estimate of the average cost of gas for year x, starting in 1997. The year 1997 would be represented by x=1, for example, as it is the first year in the study. Similarly, 2005 would be year 9, or x=9. What is the slope (or rate of change) of this equation?
Click here to see answer by richard1234(5390)

Question 410709: f(x)= 6/x+3 g(x)= 2/3x find (f o g)(x) and (g o f)(x) I don't think I know how to set this up when there are fractions involved. Please help, if possible.
Click here to see answer by stanbon(57377)

Question 410665: Suppose you are paying your cell phone bill. The function C(m) represents the cost C of your monthly cell phone bill with m representing the minutes. Given the equation: C(m)=0.25(m) What does the number 0.25 represent. I already know that m stands for minutes and C stands for cost. What is the other information that I need to figure out how much the phone bill is in which the value would be a constant?
Click here to see answer by richard1234(5390)

Question 411017: I need help, please!!!
Suppose you are paying your cell phone bill. The function C(m) represents the cost C of your monthly cell phone bill with m representing the minutes. Given the equation: C(m)=0.25(m) What does the number 0.25 represent.
Find C(894).
C(1526)

Click here to see answer by edjones(7569)

Question 411037: A basketball team plays in an arena with a seating capacity of 10,000 spectators. With the ticket price set at $12, average student attendance at recent games has been 5,000 spectators. A market survey indicates that for each dollar the ticket price is lowered, the average attendance increases by 250. Write a function that expresses the revenue in terms of x, the number of dollar decreases in ticket price.
Click here to see answer by edjones(7569)

Question 411058: 1.)Solve (using algebra)for x: 6|x|-7=17

Click here to see answer by Tatiana_Stebko(1326)

Question 411086: Find the slope-intercept form equation of the line that has the given characteristics. Slope is 6 and the y-intercept is (0,5). So the slope intercept equation is what?
Click here to see answer by rfer(12666)

Question 411088: Given the function H(9)=9v+4, find each of the following:
H(6)=
H(-5)=
H(6.8)=
Click here to see answer by rfer(12666)

Question 411087: Find an equation fo the line containing the given pair of points:
(1,5) and (3,6). So y= what?
Click here to see answer by josmiceli(9697)

Question 411084: Suppose you are paying your cell phone bill. The function C(m) represents the Cost (C) of your monthly bill with (m) representing minutes. Given the equation:
C(m)=0.25(m) Please find C(894) and C(1526). Hint: 894 and 1526 are the inputs. Place the value into the equation and solve.
Click here to see answer by edjones(7569)

Question 411165: Find the domain
p (x)=x2+3
the 2 is above the x?
Click here to see answer by MathLover1(6634)

Question 411159: Given the function K(s)=2s+9, find each of the following.
K (4)=
K(-7)=
K (6.6)=
Click here to see answer by edjones(7569)

Question 411155: find the function value.
f(x)=x3-its a small 3 above the x
F(5)=??
Click here to see answer by rfer(12666)

Question 410964: what is the domain of a negative fraction (-2/x)
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Question 410950: A manufacturer of cell phones has fixed daily costs of 15,700 yuan, and it costs 178 yuan to produce one cell phone. If the manufacturer produces x cell phones daily, express the daily cost in yuan as a function of x.

Please help? I'm stuck on this word problem.
Thank you!
Click here to see answer by richard1234(5390)

Question 411454: Given the function K(s)=2s+9, find each of the following.
K(4)=
K (-7)=
K (6.6)=
Click here to see answer by stanbon(57377)

Question 411454: Given the function K(s)=2s+9, find each of the following.
K(4)=
K (-7)=
K (6.6)=
Click here to see answer by rfer(12666)

Question 411083: Find an equation of the line containing the given point and perpendicular to the given line:
(1,4)
x-2y=6
Click here to see answer by rfadrogane(214)

Question 411658: Not understanding this question
Given the function: f(x)=4x+6, find each of the following
f(2), f(-3), f(0)
f(2)= _______
f(-3)=_______
f(0)=_________
Click here to see answer by stanbon(57377)

Question 411709: y=0.15x+0.79 what is the y-intercept?

Click here to see answer by rfer(12666)

Question 411711: Find an equation of the line containing the given point and parallel to the given line:
(2,5)
3y-x=6
Click here to see answer by jjordan95(63)

Question 411850: Given f(x)=-x^3+2x^2-2x-2, find f(-2). I need the steps to get the answer.
Click here to see answer by richard1234(5390)

Question 412169: Which of the following values would complete the ordered pair if the point is on the graph of f(x) = -2x + 3

Click here to see answer by solver91311(16897)

Question 412237: If f(x) equal negative xto the second power minus 9 what is f(3)?
Click here to see answer by rfer(12666)

Question 412243: y= -2x-1
Click here to see answer by Alan3354(30993)

Question 412358: What is the domain for x=-y^2
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Question 412377: A gallon of oil is poured to a cubical container 7 inches on an edge. About how high in inches does the oil rise in the container? (I gallon = 231 cubic inches)
Click here to see answer by mananth(12270)

Question 412378: a cube has an edge of 4, if the cube is split into cubes with edges of 2, what is the total surface area of the smaller cubes ?
a) 32 b) 64 c) 96 d) 192

Click here to see answer by mananth(12270)

Question 412400: Hi!

Can you prove that: if so we have
Whith that, I'll determine the slope of the function.
I tried at first to calculate f(b)-f(a), but I don't know what to do after that...
Thank you and sorry for bad English.

Click here to see answer by richard1234(5390)

Question 412375: A whistle blows every 14 minutes and a bell rings every 12 minutes. If the whistle and bell both sound together at 12 :00 noon, at what time, afternoon, will they first sound together again ?
a) 2:48 b) 2:24 c) 1:54 d) 1:24
Click here to see answer by ankor@dixie-net.com(15659)

Question 412822: I am doing my homework and need some help with this problem, thank you.
It states:
A function who's output is always the same regardless of the input is a constant function. Give several examples of constant functions from real life.

Click here to see answer by shree840(260)

Question 412817: Please help me with this problem:
A function can be represented as a set of ordered pairs where the set of all the first components is the domain and the set of all of the second ordered components is the range. If each ordered pair (a,b) is replaced by (b,a), is the new set still a function?

Click here to see answer by solver91311(16897)

Question 413598: Solve 5x^2=10
Find the x-intercepts of f(x)=5x^2-10
Click here to see answer by ewatrrr(10682)

Question 413659: (x-8)^2=25
Give exact and approximate solutions to 3 decimal places.
Click here to see answer by richard1234(5390)

Question 413659: (x-8)^2=25
Give exact and approximate solutions to 3 decimal places.
Click here to see answer by solver91311(16897)

Question 413625: f(x)= -1/5x^2
Click here to see answer by MathLover1(6634)

Question 413665: Find a linear function h such that h(-1)=-5 and h(7)=-6. What is h(3/2)?
Click here to see answer by Edwin McCravy(8909)

Question 413823: Given the function f(t) = |t| -5
f(-87)=
f(5)=
f(2/3)=
f(-4)=
It's the absolute value of t followed by a negative number that is throwing me.
I got -92,0, -4 1/3, -9 for my answers, but I'm not sure if I did this right. Can you please help.
Thank you!!
Click here to see answer by richard1234(5390)

Question 413678: I am having a hard time with composition of functions can someone please explain to me how to solve them here is the problem: Given that f(x)=8x+2 and g(x)=6−x2, calculate
(a) f(g(0))=
(b) g(f(0))=
I just don"t know... thanks

Click here to see answer by sudhanshu_kmr(1152)

Question 414305: To find c, the total cost of an order of DVDs from a certain website, the equation
c=19.99n + 4.99 can be used where n represents the number of DVDs ordered. If c is a function of n, which of the following best describes this relationship?
A: The value of N is constant i n relation to C
B: The value of N is dependent on C
C: The value of C is constant in relation to N
D: The value of C is dependent on N

Click here to see answer by ewatrrr(10682)

Question 414404: Given the function f(x) = x + 3x + 4 , find the value of f(–1)
Click here to see answer by emargo19(101)

Question 414407: For f(x) = , find f(-1)
Click here to see answer by Alan3354(30993)

Question 414403: What is the slope m and y-intercept point of the line 3x – y = –2?
Click here to see answer by rfer(12666)

Question 414429: y= k/x k does not equal 0
what would the graph of this look like
Click here to see answer by jim_thompson5910(28598)

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