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

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Question 502482: does x^2+y=36 define y as a function of x
Click here to see answer by Gogonati(855)

Question 502454: Given: f(x) = x2, g(x) = x + 6, h(x) = 7
Find g{f[h(x)] }.

Click here to see answer by Gogonati(855)

Question 502458: what is the domain of (2x^2 - x - 2)/(x^2 + 1)
Click here to see answer by Gogonati(855)

Question 502581: The equation of the line that goes through the points (-7, -2) and (5, 3) can be written in general form Ax + By + C = 0. Find A, B, C

Click here to see answer by Alan3354(69443)

Question 502798: 0.9(5x+15)=2.1-(x+3)

Click here to see answer by rfer(16322)

Question 502979: 2/3(2x-1)<6
Click here to see answer by jim_thompson5910(35256)

Question 503229: Find f (a), f (a + h), and the difference quotient for the function given below, where h does not equal 0.
f (x) = 5x2 + 9
Click here to see answer by stanbon(75887)

Question 503296: F(x)= 3x-8
-----
4x+20
This means wherever you see the letter x, you replace it with (3x-8) since that is the given function.
Therefore it would be set up:
4(3x-8)+20=0
Next, distribute (multiply 4(3x) and 4(-8)
12x-32+20=0
(-32+20 can be condensed)
12x-12=0
Now you want your x's on one side, and numbers on the other.
This is done by adding 12 to both sides so it cancels on one side, and transfers over to the other.
12x=12
Finally, we want x by itself to determine what its value is.
This is done by dividing by the number attached to the x.
And remember, whatever you do to one side, needs to be done to the other.
Therefore, divide both sides by 12
x=1
Click here to see answer by nic0le116(25)

Question 503576: How would you find the range of a function on the given domain.
f(x)=,
Click here to see answer by jim_thompson5910(35256)

Question 503695: A new set of car tires has a tread depth of 8 millimeters. The tread depth decreases 0.12 millimeter per thousand miles driven. Write an equation that gives the tread depth as a function of the distance driven.
Click here to see answer by oberobic(2304)

Question 503704: f(z)=4z^2-3z+1.Give its domain using interval notation.
Click here to see answer by jim_thompson5910(35256)

Question 504040: Given f(x)=-2x^2 + x-5, find f(x+3).
Click here to see answer by jim_thompson5910(35256)

Question 504141: How do I solve for the domain of f(x): 3x^4-10 algebraically?
Click here to see answer by tinbar(133)

Question 504373: evaluate the function g(x)= 1+2x
g(a+1) =
Click here to see answer by jim_thompson5910(35256)

Question 504558: If f(x) and f(g(x)) are surjective does it follow that g(x) is surjective?
Click here to see answer by richard1234(7193)

Question 505347: Express H(x) = g(f(x)), when f ( x ) = 4x-5 and g(x) = 2x^2 - x
Click here to see answer by Edwin McCravy(20054)

Question 505722: [1/2+1/4][1/2+1/3]
Click here to see answer by stanbon(75887)

Question 506881: please help my son and i work out a function value. f(8)if f(x)=x+11
Click here to see answer by jim_thompson5910(35256)

Question 507050: Write the equation of a line that passes through the given point and is perpendicular to the given line. Write the equation in the form of Ax + By=C, where a, b, and c are integers and a>0
(-6,-2);2x-5y=8
Click here to see answer by jim_thompson5910(35256)

Question 507312: I need help with this problem 1/3(z+2)=1/9z
Click here to see answer by stanbon(75887)

Question 507378: whats this function f(x)=x2-3
Click here to see answer by oberobic(2304)

Question 507496: f(x) 3(x-1) (x=4)state the x intercepts and the y coordinates
Click here to see answer by oberobic(2304)

Question 507517: I seem like I understand it and then when i get to the test I feel like i like blanked out especially with functions

Click here to see answer by Earlsdon(6294)

Question 507522: If h(x)=x^2+3x-1, find h(0)
Click here to see answer by jim_thompson5910(35256)

Question 507558: If a graph is a line that is perpendicular to the line g(x) = 8x − 4and contains the point (4, 6),determine the linear function
Click here to see answer by oberobic(2304)

Question 507584: write a formula for a linear function f whose graph satisfies the conditions.
Slope 4/9
y-intercept 8/5
Click here to see answer by jim_thompson5910(35256)

Question 507603: how do rewrite this equation in funtion form:
-3x + y = 12
i tried :
y = 3x = 12 then im lost.
Click here to see answer by Fombitz(32388)

Question 507081: find the domain of f(x)= sqrt{x^2 - 36}
Click here to see answer by bucky(2189)

Question 507823: Hi, Can someone please help me solve this:
Given f(x)=4+ 5/x and g(x)=2/x
what is (f/g)(x)?
I keep getting x+ 5/2x, But that isn't right.
Click here to see answer by richard1234(7193)

Question 507968: Determine the slope of the curve defined by the equation:
f(x) = -10 x^2 + 5 x + 1
when x = -5.
The slope of the curve when x = -5 is m =
Click here to see answer by stanbon(75887)

Question 508110: for each function find the indicated values...
f(x)= 2x+5
f(6)
f(1)
how do i do this problem?
Click here to see answer by stanbon(75887)

Question 508191: What is the domain and range of the function f(x)=3-5x
Click here to see answer by stanbon(75887)

Question 507964: Let f(x) be the function 2 x - 2. Then the quotient
\frac{f(3+h)-f(3)}{h} can be simplified to
Click here to see answer by richard1234(7193)

Question 508565: Please help!
Find the value of the function.
Given f(x)=1/4x+5, find f(-3)
Click here to see answer by Alan3354(69443)

Question 508565: Please help!
Find the value of the function.
Given f(x)=1/4x+5, find f(-3)
Click here to see answer by stanbon(75887)

Question 508763: Hi. Can you please help me with one section of my homework for tonight? It says to "Evaluate the function for these values of x: -2, -1, 0, and 1. I just need to know how to solve it. An example is y=x+5
Thank you for your help!

Click here to see answer by Earlsdon(6294)

Question 508898: Let f(x)=x^2-4 and g(x)=-5X+3
f(x)= -3x^2+ -4, g(x)=x3+3X^2
Click here to see answer by oberobic(2304)

Question 509156: The domain of the function y=5x-1 is 1, 3, 4, 5, and 6. Which number is in the range of the function?
Click here to see answer by richard1234(7193)

Question 509329: {(10,-5), (3,3), (4,1), (4,-2)}
Range and Domain Please
Click here to see answer by Edwin McCravy(20054)

Question 509370: The function f is defined by f(x) = x^3
Find the expression for g(x) in terms of x in each of the following cases
(a) f(g(x)) = x + 1
(b) g(f(x)) = x + 1
Click here to see answer by swincher4391(1107)

Question 509393: evaluate the function f9x)=3x-10 for the given value of x
1. x=20 and 1 x=2 over 3
Click here to see answer by jerryguo41(197)

Question 509414: how do you find the domain and range of g(x)=(4x-20)/(3x-18)
Click here to see answer by oberobic(2304)

Question 508757: Im sorry if i bother anybody but i really wish someone could please help me to solve these two problems i have read and reread the examples provided on my book but i still cant quite understand it well enough could someone please help me and explain it too me i need help with number 1 and number 3 i will truly appreciate it

Click here to see answer by richard1234(7193)

Question 509571: Find the domain of f(x)=sqrt(20-12x)
A. (-infiniti,0]
B. [0, infiniti)
C. [5/3, infiniti)
D. (-infiniti, 20]
E. (-infiniti, 5/3]
Click here to see answer by edjones(8007)

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