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

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Algebra: Functions, Domain, NOT graphing

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Question 15659: find the domain for f(x)=(2x+1)/(x+6).
Click here to see answer by venugopalramana(3286)

Question 15862: 3x-5y=10
Click here to see answer by rapaljer(3622)

Question 16043: how do you identify funktions?

can you show me how to do this problem
the rule: evaluate the function f(x)=3x-10 for the given value of the variable.
x=-2
can you show me how to do it please!!!

Click here to see answer by AnlytcPhil(958)

Question 16058: how do you give the domain and the range?
can yo please help me!!!

Click here to see answer by rapaljer(3622)

Question 16118: I don't understand how to do this.
Evaluate x^2y^3 / \/x^2 + y^2 when x = 6 and y = -8.
Click here to see answer by askmemath(368)

Question 16052: do you semplefy when you get f-2=-12?
Click here to see answer by 997966(3)

Question 16411: How do I find the slope and the y-intercept of this equation?
y=3/5x-7
2-1
Click here to see answer by rapaljer(3622)

Question 16411: How do I find the slope and the y-intercept of this equation?
y=3/5x-7
2-1
Click here to see answer by xxtweedybirdxx(2)

Question 16473: Please help me understand how to factor this. I understand how to factor quadratic equations but this for some reason throws me for a loop. Thanks in advance.
Factor the polynomial 27x^3 - 8y^3.
Click here to see answer by Earlsdon(4900)

Question 16460: Rewriting an Equation in Function Form. The certain topic would be rewriting the equation so that y is a function of x, here is the question. 1/4y+3=-5x Now keep in mind that my teacher demands that every evidince of how we solved this is showed please send the work as well if I see and example problem and study off it more thoroughly I might become accustomed to this.
Sincerely,
Jeremiah.
Click here to see answer by Earlsdon(4900)

Question 16500: -4/9(2x-4)=48 please show me stepwise
Click here to see answer by elima(1433)

Question 16499: -4/9(2x-4)=48 please show me stepwise
Click here to see answer by kikerkins(17)

Question 14330: Please help me determine if this relation is a function
Click here to see answer by kikerkins(17)

Question 11938: How do you combine like terms like this? -5x+8+7x-11
Click here to see answer by rahman(247)

Question 16693: Please help with the following:
If g(x) = x ^2 - 3x, find what the square root of (g(-1) ) is.
I started with:
the square root of g times -1 = the square root of 1^2 - 3 times the square root of -1
the square root of g times -1 = 1- 3, times the square root of -1
the square root of g times -1 = -2, times the square root of -1
the teacher's answer is 2 and I'm not sure how he got it and if it would be
"the square root of g times -1" = 2.
Please help!
Click here to see answer by bam878s(76)

Question 16720: Please help me with the following:
Find the indicated difference quotient and simplify answer:
Given f(x) = 5x + 3
find f(x) f(2) over x-2
what I tried:
1. f(x) = 5x+3
2. f(x) - f(2) = 5x + 3 - 5x + 3(2) = 9
3. f(x) - f(2) over x-2 = 9 over 5x + 3-2 = 9 over 5x + 1
Unfortunately this does not come close to the teacher's answer of 5.
Can you please tell me what I'm doing wrong?
Thanks
Sandy
Click here to see answer by bam878s(76)

Question 16724: Please help with this problem:
Find the indicated difference quotient and simplify answer.
Given f(x) = x^2 = 5x + 1
find f(5 + h) - f(5) over h
what I did:
1. f(5+h) = (5+h)^2 + 5(5+h) +1
=(5+h)(5+h) + 5(5+h) +1
=25 +5h +5h +h^2 +25 +5h + 1
=51 + 15h +h^2
2. f(5+h) - f(5) = 51 + 15h + h^2 - 5^2 + 5(5) + 1
= 51 + 15h + h^2 - 25 + 25 + 1
= 52 + 15h + h2
3. f(5+h) - f(5) over h = 52 + 15h + h^2 over h
The teacher's answer is 15 + h
Where did I go wrong?
Please help!
Thanks,
Sandy
Click here to see answer by rapaljer(3622)

Question 17180: Reduce Rational Expression to lowest terms

x2 - 4
------------
2x2 + 8x + 8

the x is squared and the 2x is also squared
I know that verything is supposed to be factored first but I don't know what to do after that.
Click here to see answer by Earlsdon(4900)

Question 17275: f(x)=-3x+4
g(x)=3x+3

(g-f)(x)=
g(x)= 3x+3
f(x)= -3x+4
therefore: (g-f)(x)= 3x+3 -(-3x+4)
subtraction of g(x)-f(x) = 3x+3+3x+4
final result = 6x+7

(g+f)(x)=
g(x)= 3x+3
f(x)= -3x+4
therefore: (g+f)(x) = 3x+3 +(-3x+4)
sum of g(x)+f(x) = 3x+3-3x+4
final result = 7

(g*f)(x)=
g(x)= 3x+3
f(x)= -3x+4
therefore: (g*f)(x)= (3x+3)*(-3x+4)
product of (g*f)(x)= -9x²+12x-9x+12
simple answer = -9x²+3x+12
factorial answer = (-9x+12)*(x+1)
Click here to see answer by ENGSCI(1)

Question 17301: rewrite the equation in function form:
-x +y = 6
Click here to see answer by rapaljer(3622)

Question 17617: please give me the domain & range of this function
f(x)= 1/{sqrt(4-x^2)}
Click here to see answer by venugopalramana(3286)

Question 17616: please give the range and domain of this function
f(x)=1/{sqrt(x^2-4)}
Click here to see answer by venugopalramana(3286)

Question 17636: Hi, Goog morning, I am having a math test on Monday and I need a little help recognizing functions and non functions . Do you think you can help me understand? I am an A student and would like to get as much help as I can
Click here to see answer by venugopalramana(3286)

Question 17993: 1
___
y-1

+

5
__
12
=
-2
___
3y-3
All on one line.
Click here to see answer by xcentaur(357)

Question 17747: 2-4+-4
Click here to see answer by ivy12003(22)

Question 18346: A set of children's blocks contains 3 shapes: Longs, flats & cubes
There are 3 times as many longs as cubes and 30 fewer flats than longs. If there are 600 blocks in all, how many longs are there?
Click here to see answer by pwac(251)

Question 18446: explain why function y=x square has no inverse.suggest how many inverse can you
define for it
Click here to see answer by venugopalramana(3286)

Question 18471: evaluate the expression

Click here to see answer by xcentaur(357)

Question 18532: 800-50X=150
Click here to see answer by piglet162431(90)

Question 19206: I am not sure what this is called but could you show me how to work it out step by step? I would be greatful. Solve F = 9C + 160 for C
________
5
I tried to figure it out but I am not getting the answer the book shows. The line & 5 is supposed to be underneath9C + 160
Thanks in advance
Click here to see answer by wuwei96815(245)

Question 19186: Solve this problem.
Office space. The length of a professor`s office is x feet, and the width is x + 4 feet. Write a polynomial that represents the area. and find the area if x = 10ft.
Click here to see answer by wuwei96815(245)

Question 19322: We are learning about "f of g" (fog as the teacher calles it) and "g of f" (gof as the teacher calles it)! Please explain the procedure for this!
Perform the following operation on the listed problem (a) f of g, & (b) g of f;
f(x) = 2x + 1 g(x) = 3x - 2
Thank you so much!
Sheri
Click here to see answer by Earlsdon(4900)

Question 19333: 3(x-6)+6=5(x+2)-12
Click here to see answer by mmm4444bot(95)

Question 19341: Hello
My daughter need help finding the domain of the rational function.
f(x)=x^2-36/x^2-7x+6
Thanks
Click here to see answer by xcentaur(357)

Question 19427: Chage the fraction 93/1000 to a decimal
Click here to see answer by thurston(8)

Question 19431: A druggist is perparing a medication. Each caspsule reqires 0.007 gram of aspirin. He has 14grams of aspirin. How many capsules can he prepare?
Click here to see answer by xcentaur(357)

Question 19030: my son needs three interesting facts about algebra
Click here to see answer by thurston(8)

Question 19530: how do I solve this problem [please show step by step]

9t-(2t-8)=1
Click here to see answer by rahman(247)

Question 19592: What is the funtion of fof; gog; given f(x)=3-5x and g(x)=1-3x? I understand that gof is equivocated to g(f(x)) but don't understand how to do fof & gof.
Click here to see answer by venugopalramana(3286)

Question 19885: Why do mathmagicians use the letter m for slope in the function y=mx+b?
Click here to see answer by christinaaa192(28)

Question 19949: 11b+9_>10b-4
Click here to see answer by piglet162431(90)

Question 19704: how do u solve : Graph the soulution set if the domain is { -2, -1, 0 , 2, 4} problem : 3x-y=10
Click here to see answer by Sugapye34d(1)

Question 20298: Can you help me solve for P:I=Prt ?
Click here to see answer by Earlsdon(4900)

Question 20363: State the domain and range of the function f(x)= x(squared)- 3
Click here to see answer by ichudov(404)

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