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

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Question 480662: Hi i'm having a little trouble with a section in my math packet for the summer. I already had help on a similar problem but im still having trouble. I have to determine the domain and range for y = sqrt2x-1. Thanks for your help!
Click here to see answer by stanbon(75887)

Question 480772: Write an expression for the situation. Number of meters in c centimeters
Click here to see answer by stanbon(75887)

Question 480762: f(x)=x^2+1 find for f(x+2)
f(x+2)=(x+2)^2 +1
=x^2+4+1
=x^2 +5
But book answer is: f(x+2)=x^2+4x=5
I can not figure out where you get the 4x- what step am I missing?
Click here to see answer by nerdybill(7384)

Question 480747: If g(x)=lx+3l, find g(-7)
Click here to see answer by Tatiana_Stebko(1539)

Question 480906: Need help solving the following:
Write the domain for the following functions in interval notation:
f(x)= sqrt(5-x)
f(x)= log(10)(x-2)
Click here to see answer by lwsshak3(11628)

Question 480715: Rewrite the vertical line test as two if-then statements.

Click here to see answer by richard1234(7193)

Question 481325: How do you determine if an equation defines 'y' as a function of 'x' such as in y= x^2?
Click here to see answer by Alan3354(69443)

Question 481330: find the equations of both the vertical and horizontal asymptotes of the function g(x)x=7/x^2-4
Click here to see answer by lwsshak3(11628)

Question 481609: Please help me solve for the intercepts in this equation:
f(x)=(2x-4)(x+2)
Click here to see answer by jim_thompson5910(35256)

Question 481611: solve the problem. (f-g)(-3) when f(x)=5x^2-5 and g(x)=x-7
Click here to see answer by jim_thompson5910(35256)

Question 481937:
i have to find the domain
Click here to see answer by jim_thompson5910(35256)

Question 481996: given the function f(x)=5x-2, evaluate f(x+5)
how do you solve these types of problems?
Click here to see answer by stanbon(75887)

Question 482262: find domain and range of 1/(root of x3-4x)
Click here to see answer by stanbon(75887)

Question 482306: I am having trouble understanding functions. I am an on line student and my homework program had problems that sis not look quite like the one on a practice test i am taking. This is the question (I am sorry i am trying to follow the rules above but it is a 5 part question so only answer what you think would help me grasp this the most):
a graph accompanies this question with points in this order from right to left:
(-8,0)(-5,3)(0,-4)(5,0)(7,6)
Given the following function:
a) f(-5)=
b) f(0)=
c) What is the domain? {-8,7} (these I am somewhat comfortable with)
d) What is the range? {-4,6}
e) Find the value(s)of x such that f(x)=0

Click here to see answer by stanbon(75887)

Question 482412: Hi, my son and I need some serious help with this particular question: Determine whether the relation in the table below is a function, and if so, write a function rule.
Table reads:
x y
-1 1
0 2
2 4
3 5
a)yes;f(x)=-1(x)
b)yes;f(x)=x/2
c)yes;f(x)=x+2
d)not a function
Click here to see answer by Earlsdon(6294)

Question 482500: I dont understand how to get this answer for my precal homework the answer is (6x(raised to the 2nd) -39x=52)/(x-9)(x+2) for the equation if f(x)= ((x+8)/(x-9))+((5x-4)/(x+2))
Click here to see answer by LagrangeSon678(5)

Question 482617: f(x)=7x+9/sqrt 10x-25-x
find the domain of the function. I am having a hard time figuring out the steps to solve this type of equation.
Click here to see answer by cleomenius(959)

Question 482541: Find the domain of y=x/cosx
I know that cos(x)can't equal zero and that means x can't be pi/2, 3pi/2, etc.
Just not sure on how to notate the domain for this one.
Click here to see answer by richard1234(7193)

Question 483234: 3^3-1/2-3=
I think the answer is 23.5 and my friend thinks it is 26
I am confused on what is wrong.
Click here to see answer by gabriel24(6)

Question 483364: When the monarch butterfly is migrating to the south , it has an average speed of 80 miles per day. Write a rule for the distance the butterfly flies as a function of the number of days it has traveled.
Click here to see answer by Alan3354(69443)

Question 483486: given f(x)={(3,5),(2,4),1,7)} and h(x)={(3,2),(4,3),(1,6)}
find (f+h)(1)
Click here to see answer by stanbon(75887)

Question 483642: What is the range of the function f(x) = xsquared + 3 if the domain is {-3,0,3}?
Click here to see answer by Tatiana_Stebko(1539)

Question 483666: Give Inverse of statement "If I have the flu, then I will run a fever".
Click here to see answer by MathLover1(20849)

Question 483799: solve for y

Click here to see answer by solver91311(24713)

Question 483734: f(x)=3x^2-x+10
g(x)=1-20x
Find find the inverse of both functions
Click here to see answer by lwsshak3(11628)

Question 483794: Solve equation for y

Click here to see answer by Edwin McCravy(20054)

Question 484117: what is the domain and range of the function... f(x)= square root of (9-x^2)/ x+2
Click here to see answer by chessace(471)

Question 484181: how to complete the table for f(x)=5^x
Click here to see answer by chessace(471)

Question 484187: What is the domain of: 1/x^2-2x
Click here to see answer by stanbon(75887)

Question 484187: What is the domain of: 1/x^2-2x
Click here to see answer by chessace(471)

Question 484177: k^-1(x) when k(x) = x^2+5
Click here to see answer by stanbon(75887)

Question 484306: if f(x)=2x3-8x-3 then find f(-2)

Click here to see answer by parthdesai27(11)

Question 484124: what is the domain and range of f(x)=x^2/(4-x^2)
Click here to see answer by lwsshak3(11628)

Question 484123: what is the domain and range of the function ... f(x) = x/(x^2+6x)
Click here to see answer by lwsshak3(11628)

Question 484122: what is the domain and range of the function... f(x)= square root of (x^4-25x^2)
Click here to see answer by lwsshak3(11628)

Question 484494: is the following relations a function ? explain you answer (1,2) (2,3) (2,5) (2,7)
Click here to see answer by tinbar(133)

Question 484120: What is the domain and range of the function ... f(x)= square root of (3-x)/(x-2)(x^2+5)
Click here to see answer by lwsshak3(11628)

Question 484114: what is the domain and range of the function.... f(x)= 4/x + 8/(x+2)
Click here to see answer by lwsshak3(11628)

Question 484113: What is the domain and range of the funtion... f(x)=2x+4/(x-7)(x+5)
Click here to see answer by lwsshak3(11628)

Question 484731: what is the domain and range for the following function y=2 sqrt 2x
Click here to see answer by Tatiana_Stebko(1539)

Question 484847: Use two integers between -12 & +12 which will become solutions to a system of two equations.
write two equations that have your integers as solutions. solve your equations by the addition and subtraction method.
I know to use the algebra form of ax+by = c. I don't understand which random integer can be used.
Can you please show me using the required integers how I do this?
Click here to see answer by jim_thompson5910(35256)

Question 484881: 2/5x=12
Click here to see answer by jim_thompson5910(35256)

Question 484879: f(x)=4+4sq root (7-x)
find f(x+1)
Click here to see answer by jim_thompson5910(35256)

Question 484888: (x^2+2)(2x^2-3)
Click here to see answer by jim_thompson5910(35256)

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