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

Tutors Answer Your Questions about Functions (FREE)

Question 400054: Can you please help,
Evaluate the logarithm without a calculator:
log9(1/3)
Click here to see answer by Alan3354(69443)

Question 400054: Can you please help,
Evaluate the logarithm without a calculator:
log9(1/3)
Click here to see answer by ewatrrr(24785)

Question 400052: Can you please help:
Wvaluate without a calculator
log5(-25)
Click here to see answer by Alan3354(69443)

Question 400064: Given that f(x) = x^2 + ax + 15 has a minimum value of -12 what is a ?
think im missing something very simple in solving this problem.
its suppose to involve only algebra in order to solve but i got completely lost and tried using calculus which got me even more lost -- I was thinking minimum value -12 means lower limit of the parabula is -12 so i solved the derivative of the function to be that x =a/2 kept going for a while and got an answer that made no sense. soooo what am i missing how do i do this problem with just algebra?
Click here to see answer by ewatrrr(24785)

Question 399995: For the function f(x)=x+9 , find ( f � f ^�1)(5).
Click here to see answer by Tatiana_Stebko(1539)

Question 400142: Please can you help me evaluate the following for f(x)=(x-1)/x and g(x)=
1) f(f[g(x)])
Click here to see answer by Tatiana_Stebko(1539)

Question 400142: Please can you help me evaluate the following for f(x)=(x-1)/x and g(x)=
1) f(f[g(x)])
Click here to see answer by solver91311(24713)

Question 400306: I'm working on direct variations I've tried to solve this problem and decide whether or not if it is a direct variation; the problem is y=2x+3
and I got No, its not a direct variation is that right.

Click here to see answer by solver91311(24713)

Question 400308: I'm workiing on direct variations and the problem is y=2x+3 how would I solve this problem?
Click here to see answer by solver91311(24713)

Question 400308: I'm workiing on direct variations and the problem is y=2x+3 how would I solve this problem?
Click here to see answer by stanbon(75887)

Question 400822: what is the domain of √ ̅ (x-3) divided by x^2-8x+12?
Click here to see answer by nerdybill(7384)

Question 400822: what is the domain of √ ̅ (x-3) divided by x^2-8x+12?
Click here to see answer by robertb(5830)

Question 401372: f(y)=-6y/y+6
Click here to see answer by richard1234(7193)

Question 401661: List the possible rational zeros of the function: f(x)=
Click here to see answer by stanbon(75887)

Question 401619: if F(x) = 7/(x-4) and g(x) = 2/x find the composite of f of g (x) and the domain
Click here to see answer by edjones(8007)

Question 401727: given the function g(x)=4z+2 find each of the following
g(2)=
g(-3)=
g(6.3)=
Click here to see answer by edjones(8007)

Question 402101: g(f(x)) when f(x) = (1-x)/x and g(x) = 1/(1+x)

i know the answer is x because my frustration led me to substitute a couple of numbers in for x and my result was always whatever i plugged in for x. BUT i can't figure out how to do this without subbing in a number for x. HELP PLEASE?
Click here to see answer by Alan3354(69443)

Question 402082: if f (x)=3x-4 and g(x)=x+2, find f+g
Click here to see answer by rapaljer(4671)

Question 402647: I dot get it when a function says it wants the A and B answers??
f(x)=2x+7
that dose the A and B mean
a)f(2)
b)f(-3)
thnaks
Click here to see answer by rfer(16322)

Question 402706: is the function odd, even, or neither? f(x)= 5x^3 - 3
Click here to see answer by sofiyac(983)

Question 402705: what is the domain of 1/(x+2)(x-3)
Click here to see answer by sofiyac(983)

Question 402833: I dont understand how to do the vertical line test, can you help?
Click here to see answer by jim_thompson5910(35256)

Question 402879: Let f (x) = -2x2 + x -4. Evaluate f (-9).
Click here to see answer by jim_thompson5910(35256)

Question 403111: Let f be a linear function. If f(−3) = 7and f(2) = −13,find f(x).
Click here to see answer by scott8148(6628)

Question 403329: If p varies directly as n^2, and p = 28 when n = �4, find
a. the constant of variation.
b. an equation for the variation.
c. p when n = 9.
Click here to see answer by solver91311(24713)

Question 403376: Given the relation y = x3 � x. Determine algebraically if the graph is
a. symmetric with respect to the
x-axis
y-axis
origin
b.
even
odd
Click here to see answer by sofiyac(983)

Question 403290: Suppose you have a function y = f(x) such that the domain of f(x) is 1 ≤ x ≤ 6 and the range of f(x) is −3 ≤ y ≤ 5. What is the domain of f(2(x − 3))
Click here to see answer by jim_thompson5910(35256)

Question 403599: Decide whether the pair of lines is parallel, perpendicular, or neither.
4x + 3y = 3
3x + 4y = 1
Click here to see answer by rfer(16322)

Question 403731: Decide whether the pair of lines is parallel, perpendicular, or neither.
2x+3y=1
3x+2y=10
Click here to see answer by sofiyac(983)

Question 404040: Find the domain of each relation if the range is {0, 4, 36} . There are two equations 1. y=x squared 2. y= |2x - 4|
Click here to see answer by stanbon(75887)

Question 404150:
how do I find domain of g(x)= x+1/x-2

Click here to see answer by stanbon(75887)

Question 404466: A right triangle has one leg four times as long as the other. Find a function that models its perimeter P in terms of the length x of the shorter leg.
P(x)=
Click here to see answer by robertb(5830)

Question 404328: Given the function f(x)= 3x^2+8x-6. Calculate the following values:
f(x+1) and f(-x)
Click here to see answer by ankor@dixie-net.com(22740)

Question 404523: Find the zeros of the function by factoring or algebraically: f(x) = 2x2 - 2x - 3

Click here to see answer by richard1234(7193)

Question 404652: given the function h(x)=4x+4 find each of the following
h(4)=
h(-10)=
h(6,6)=
Click here to see answer by subudear(62)

Question 404654: write an equation of the line containing the given points and parrallel to the given line. Express your answer in the form y=mx+b
(-3,2);3x=7y+5
Click here to see answer by subudear(62)

Question 404650: determine weather the graphs of the equations are perpendicular
4x-3y=8
4y-3x=7
Click here to see answer by subudear(62)

Question 404645: find the slope and the y-intercept
f(x)=-5x-7
Click here to see answer by Alan3354(69443)

Question 404646: find the slope if it exsists of the line containing the pair of points
(-3.3,15.5) and (-0.8,5.6)
Click here to see answer by subudear(62)

Question 404646: find the slope if it exsists of the line containing the pair of points
(-3.3,15.5) and (-0.8,5.6)
Click here to see answer by rfer(16322)

Question 404762: find the domain of the function.
p(x)=x^2-2x+5
Click here to see answer by richard1234(7193)

Question 404675: f(x)=4/3x+5 What is the domain and range?
Click here to see answer by neatmath(302)

Question 405158: find the derivative ln x/ square root x^2 +1
y'=?
Click here to see answer by Tatiana_Stebko(1539)

Question 405332: solve each equation for y, x=-5/2
Click here to see answer by richard1234(7193)

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