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

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Question 114619:
A store owner bought n dozen toy boats at a cost of $3.00 per dozen, and sold them at $.75 apiece. Express the profit as a function of n.
Could you please help me show the steps in this problem? I'm not sure of how to start it, let alone solve it. Thank you.
Click here to see answer by checkley71(8403)

Question 114661: If f(x) = 4x - 3, find the following:
f(-1)
Can you show me how to figure this, I do not understand.
Thank you.
Click here to see answer by edjones(8007)

Question 114664: OH WHAT WOULD YOU PLUG IN FOR X IN THIS PROBLEM
G(X) = X2ND POWER - 2Y
3[G(X)+4]
Click here to see answer by edjones(8007)

Question 114691: Find the domain of the given function.
h(x)= 1/x+1

____ (Use interval notation.)
Click here to see answer by chitra(359)

Question 114662: If f(x) = 5x -1, find the following:
f(a-2)
Thank you.
Click here to see answer by HyperBrain(694)

Question 114773: find the domain
y=1/sqrt x-1
Click here to see answer by stanbon(75887)

Question 114770: find the domain
y=sqrt 4-x^2
Click here to see answer by stanbon(75887)

Question 114776: find the equations of the asymptotes for the function
y=1/sqrt x-1
Click here to see answer by stanbon(75887)

Question 114782: Let f(x)=sqrt x+1 and g(x)= 1/x+1. Evaluate
f(g(0))

Click here to see answer by Fombitz(32388)

Question 114785: find f and g such that h=f*g where h(x)=(1/2x-3)^3 and the inner function g is rational
Click here to see answer by jim_thompson5910(35256)

Question 114811: use the horizontal line test to determine which of the following are one to one functions
A) y=2x^2+5x-3 B) y= [x-2] C) y=x^-1/2
Click here to see answer by jim_thompson5910(35256)

Question 114947: I know it looks like it's two questions but according my book it is one. Please help me.
A function is defined by f(x) = 2x - 4
f (x + h)
f (3)
Click here to see answer by bucky(2189)

Question 115061: state the domain for the function
y=f(x)=(sqrtx^2-9)
Click here to see answer by jim_thompson5910(35256)

Question 115062: Find the domain of f, the roots of f(x)=0, and determine the signs of f where

f(x)= x^2-1/sqrt x+1 + sqrt x+1
Click here to see answer by solver91311(24713)

Question 114948: Please help me, I can manage regular problems but I'm not very good at word problems. I can't seem to make heads or tails of this one.
An object suspended from an ideal spring is pulled away from it’s equilibrium position and is released, causing the object to osculate up and down. The Frequency (f, in s^-1) of oscillation is related to the mass (m in kg) of the object, and to K a constant that depends on the stiffness of the spring, by the equation
f = the square root of k/m
If the frequency is 5.000 s^-1 and the spring constance is 16. 00 kg/s^, what is the mass of the object?
Click here to see answer by scott8148(6628)

Question 115135: Find the inverse function for f(x)= x^3 + 3
Click here to see answer by edjones(8007)

Question 115136: For f(x) = x^2 find and simplify f(x+h)-f(x) over h
Click here to see answer by jim_thompson5910(35256)

Question 115088: Let f(x)=1-2x and find
a) f^-1 (x) and b) 1/f(x)
Click here to see answer by edjones(8007)

Question 115157: Please help, I am totally confused by this question and my homework is due on Saturday.
Consider the function f(x)=x^2+6x-2
a)Find h, the x-coordinate of the vertex of this parabola
b)Substitute the two whole number values immediately to the left and right of h into the function to find the corresponding y. fill in the table below. Make sure your x-values are in increasing order in your table
x y
___ __
___ __
h= ___ __
___ __
___ __
Thank you in advance for your help
Click here to see answer by scott8148(6628)

Question 115280: what is the domain to y=x
Click here to see answer by jim_thompson5910(35256)

Question 115357: Determine the Domain of f in f(x)=10- sqrt 3-x?
Click here to see answer by stanbon(75887)

Question 115350: State the domain of the following:
g(x)= 7x+4/x+4
Click here to see answer by stanbon(75887)

Question 115348: State the domain of the following:
m(x)=5/x^2+9
Click here to see answer by stanbon(75887)

Question 115349: State the domain of the following:
l(x)= 5x-4
Click here to see answer by bucky(2189)

Question 115346: State the domain of the following:
f(x)= square root (x-8)

Click here to see answer by bucky(2189)

Question 115347: State the domain of the following:
h(x)= 3x^2+5x-3
Click here to see answer by bucky(2189)

Question 115454: Evaluate each function for x= -2, 0, and 5.
1.) y = 9+ x
2.) y = x^2 - 1

This is totally confusing me so I need help thanks!
Click here to see answer by jim_thompson5910(35256)

Question 115454: Evaluate each function for x= -2, 0, and 5.
1.) y = 9+ x
2.) y = x^2 - 1

This is totally confusing me so I need help thanks!
Click here to see answer by vertciel(183)

Question 115442: Consider the function f(x)=x^2+6x-2
a) Find h, the x-coordinate of the vertex of this parabola.
Substitute the two whole number values immediately to the left and right of h into the function to find the corresponding y. Fill in the table below. Make sure your x-values are in increasing order in your table.
x y
_ _
_ _
h=__ _
_ _
_ _

Click here to see answer by solver91311(24713)

Question 115460: function at the given value of the independent variable and simplify
f(x) = -3x-5; f(6)
Click here to see answer by jim_thompson5910(35256)

Question 115461: f(x) = x^2-1; f(x+3)
Click here to see answer by MathLover1(20849)

Question 114276: Decide whether or not the functions are inverses of each other..
f(x)=6x^2+5, Domain [0,Infiniti); g(x)=sqrt of (x-5)/(6), domain [5,Infiniti)

I believe they are??? Am I correct?
Click here to see answer by depompeigirl(3)

Question 115524: Please help.
Given f(x)=5x^2-3x+1
find f(-2)

Thanks
JMS
Click here to see answer by jim_thompson5910(35256)

Question 115559: let f(x)=sqrt x+1 and g(x)=1/x+1 and evaluate
(f*g) (x)
Click here to see answer by jim_thompson5910(35256)

Question 115630: Please help.
Given f(x)=4x+2
find f(a+2)
I came up with the answer of 4a+10. Is this correct?
Thanks
JMS
Click here to see answer by jim_thompson5910(35256)

Question 115564: find the inverse function g of the given function and state the domain and range of g
y=f(x)=(x+2)^3
Click here to see answer by edjones(8007)

Question 115662: find f(-3) when f(x)=2x^2-7x+8.
Click here to see answer by jim_thompson5910(35256)

Question 115761: I would like to know if the following make a function?
(-2,2)(-1,4)(0,-6)(1,8)(1,10)
Click here to see answer by jim_thompson5910(35256)

Question 115762: I would like to know how to solve:
Find the function of (s) when function(-14)=-6s-22

Click here to see answer by jim_thompson5910(35256)

Question 115822: The problem states:
Find the domain of the following.
f(t)=log(t-5)
g(x)=5e xpower
g(x) = ln (t+4)
g(t) = 5g tpower
I do not understand the logarithim nor the e to the x power and g to the t power. The examples in the book are not very helpful. I would appreciate any help in how to do the above work. Thank you

Click here to see answer by stanbon(75887)

Question 115886: Can someone help me with these problems? Find the domain of the following.
Show how you got the answer please.
1. f(t)=log(t-5)
2.g(x)=5e^x
3.g(x)=ln(t+4)
4.g(t)=5^t

Click here to see answer by Fombitz(32388)

Question 116112: f(x)=2x^2-3x+5, find f(1)

Click here to see answer by jim_thompson5910(35256)

Question 116109: Find A n B, given A{3,5,7,9} and B{2,3,4,5}
Click here to see answer by jim_thompson5910(35256)

Question 116240: Find the domain of the following
f(t)= log(t-5)

Click here to see answer by jim_thompson5910(35256)

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