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

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Question 305144: find the value of k so that the line has slope m:
(k+1)x+2y=6 and m= -1/3
Click here to see answer by nerdybill(7384)

Question 305139: f(x)=4x
h(x)=-7x-5
find h(f(3))
please tell me what i did wrong this is how i tried to solve the above problem
4(3)(-7(3)-5)
Click here to see answer by dabanfield(803)

Question 305185: F(x)=15-6x
h(x)=3/4x-5
find f(h(6))
Click here to see answer by isharkk(3)

Question 305170: How do I solve for f(x)=0
f(x)=4x(x+3)^2-(x+3)^3?
Click here to see answer by richwmiller(17219)

Question 305621: which is a zero of the following function?
f(x)=x^2-x-12

a.1
b.2
c.3
d.4
I have no idea what this question is asking. May you please help?
Click here to see answer by solver91311(24713)

Question 305746: Decide whether the pair of lines is parallel. perpendicular, or neither
5x+4y=7
5x+4y=4
Click here to see answer by richwmiller(17219)

Question 305748: Solve: -0.9x<-36
Click here to see answer by checkley77(12844)

Question 305747: Find the slope, if it exists, of the line containing the pair points
(1,6) and (7,-2) The slope m = ------
Click here to see answer by checkley77(12844)

Question 305743: What is the slope and the y-intercept of f(x)=-3x-5
Click here to see answer by checkley77(12844)

Question 305741: Determine whether (-8,-5) is a solution of 8x+4y=-8
Click here to see answer by checkley77(12844)

Question 305688: h(x)=square root x+6
Click here to see answer by Fombitz(32388)

Question 305928: Given the function f(x) = x + 3x + 4 , find the value of f(�1).
Click here to see answer by richwmiller(17219)

Question 305939: Let f(x) = 7x +5 / 2x - 5. Find f^-1(x).

Click here to see answer by Fombitz(32388)

Question 306129: jacob discovered that the x intercepts of a certain parabola are (3,0) and a(-1,0), but now he needs to find the vertex. can you get him started? what do you know about the vertex? draw a sketch of this parabola to help you
Click here to see answer by stanbon(75887)

Question 306164: Lynn can paint room in 40 min.
Jeff in 60 min.
How long if both paint together? Not sure what type of problem this is. fxn?
Click here to see answer by ankor@dixie-net.com(22740)

Question 306876: find all the values for which f(x)= x divided by 56x squared+ 13x-3
Click here to see answer by Fombitz(32388)

Question 306874: f(x)=16x squared -20x
find all the values for which f(x)=0
Click here to see answer by Fombitz(32388)

Question 306947: (x-1)(x+3)=5
Click here to see answer by Fombitz(32388)

Question 307036: Use the change base formula to solve the equation.
3^x = 27.3
Click here to see answer by nerdybill(7384)

Question 307301: find the horizontal asymptote, if any, of the graph of the rational function.
f(x)=14x/7x^2+6
type the equation of the horizontal asymptote
Click here to see answer by rapaljer(4671)

Question 307302: find the horizontal asymptote, if any, of the graph of the rational function
g(x)=14x^2/7x^2+2
type the equation of the horizontal asymptote
Click here to see answer by rapaljer(4671)

Question 307300: find the vertical asymptotes, if any, of the graph of the rational function
f(x)=x/x^2+8
the equation of the vertical asymptote is
x=
Click here to see answer by rapaljer(4671)

Question 307299: find the vertical asymptotes, if any, of the graph of the rational function
h(x)=x+3/x(x+1)
type the equation of the vertical asymptotes
Click here to see answer by rapaljer(4671)

Question 307304: If f(x) = 2√x then what is the smallest number in the domain of the function f ?
Click here to see answer by nerdybill(7384)

Question 307359: trains A and B are traveling in in the same direction on parallel tracks. train A is traveling at 80 miles per hour and train B is traveling at 100 miles per hour. train A passes a station at 6:10 A.M. If train B passes the same station at 6:25 A.M., at what time will train B catch up to train A?
Click here to see answer by ankor@dixie-net.com(22740)

Question 307366: translate into an algebraic expression. The product of 22% and some number. (Type the percentage as a decimal. Use y to represent some number.)
Click here to see answer by rapaljer(4671)

Question 307361: on three consecutive passes, a football team gains 9 yards, loses 14 yards, and gains 21 yards. What number represents the total net yardage?
Click here to see answer by checkley77(12844)

Question 307360: find the indicated outputs for f(x)=3x(2)-4x
f(0)=
f(-1)=
f(2)=
Click here to see answer by checkley77(12844)

Question 307291: find the domain of the function
f(x)=x^2-9x-11
what is the domain of f?
Click here to see answer by rapaljer(4671)

Question 307290: find the domain of the function
f(x)=12/x-15
what is the domain of f?
Click here to see answer by rapaljer(4671)

Question 307292: find the domain of the function
f(x)=sqrt (x+8)
what is the domain of f?
Click here to see answer by rapaljer(4671)

Question 307293: find the domain of the function
g(x)=sqrt(5x+5)
what is the domain of g?
type answers in interval notation.
Click here to see answer by rapaljer(4671)

Question 308069: For f(x)=2x+6, find f(3) and find x such that f(x)=10
Click here to see answer by JBarnum(2146)

Question 308184: what is the domain of y equals the square root of x minus 3
Click here to see answer by rapaljer(4671)

Question 308125: Problem: (x-1)(x-1)(x-1)=y. solve for x
I worked the problem by multiplying and got:
x^3-3x^2+3x-1=y
then went to x^3-3x^2+3x = y +1
I honestly dont know what to do from here.
thanks sheri
Click here to see answer by scott8148(6628)

Question 308441: Please help me to figure this one out and more importantly understand it in laymens terms. Let f(x)=x to the second power + [x] Evaluate f(2), f(-2) I used substitution but this does not seem right.
Click here to see answer by stanbon(75887)

Question 308718: find the domain of the function
h(x)=log4(x+5)
Click here to see answer by rapaljer(4671)

Question 308749: Which of the following are functions? The last two problems, i.e., b & c, are multi part relations consider all parts when determining whether or not these relations are functions. Explain your reasoning for a, b, and c.
a. f(x) = x + 3
b. f(x) = 73 if x>2 otherwise f(x) = -1
c. f(x) = 79if x>0 or f(x) = -9 if x<0 or f(x) = 9 or -9 if x = 0

Click here to see answer by Fombitz(32388)

Question 309248: problem: f(x)=-2*x^3-9*x^2+24*x+1
I'm trying to find out how to determine the interval on which funtion increases and decreases, and how to determine the local minima and local maxima
Click here to see answer by stanbon(75887)

Question 309595: I AM SUCH AN IDIOT.
I NEED HELP WITH EVERYTHING ABOUT ALGEBRA.
I DON'T UNDERSTAND ANYTHING.
INEVER UNDERSTOOD ANYTHING.
HELP ME.
1) x^2-2x-7= sqrt (5)
2) 3/5 = sqrt (9)
3) 56x -18x+ x^2= 17
4) sqrt (9) = sqrt (35)

Click here to see answer by checkley77(12844)

Question 310087: Please help me with this problem. f(x)= x(squared)-5x+4/x(squared)-4.
Find f(2). Express the domain of "f" using interval notation.
I don't understand this problem. When it says f(2), does it mean substitute all the x's in the equation as 2's?
Click here to see answer by checkley77(12844)

Question 310136: y = |x| is a function or not?
Click here to see answer by Edwin McCravy(20054)

Question 310391: find the domain
g(x)=(8)/(4-3x)

Click here to see answer by solver91311(24713)

Question 310391: find the domain
g(x)=(8)/(4-3x)

Click here to see answer by Fombitz(32388)

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