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

Tutors Answer Your Questions about Functions (FREE)

Question 238508: find the domain of each rational function
f(x)= 7x
____________
x^2+16
Click here to see answer by edjones(7569)

Question 238636: Can you explain why y=x^2 is the graph of a function of x, while x=y^2 is not the graph of a function of x?
Click here to see answer by josmiceli(9654)

Question 238585: how do you do this problem?
g(2x)+1
Click here to see answer by Alan3354(30982)

Question 238695: Lim Sin (1/x)
X-0
Click here to see answer by solver91311(16868)

Question 238764: how do u solve 4(a)= 3a*3a-2
Click here to see answer by checkley77(12569)

Question 238767: I am having trouble with this question:
Find the domain of the function
g(x) = 8/3-5x
the / is supposed to under the 8 and the 3-5x is under the /
Any help would be appreciated. Thank you in advance for helping me with this problem.
Click here to see answer by JimboP1977(308)

Question 238817: rewrite 6y-6x=15 so that y is a function of x
6y=15+6x
y=5/2+x
Click here to see answer by penguin1(1)

Question 238252: simplify
m^2-16m / 16-m
Click here to see answer by College Student(505)

Question 239140: please help me solve this equation
The function, f(x)=2x^3-3x, is
a.even
b.odd
c.neither even nor odd
d.none of the above
Click here to see answer by jsmallt9(3296)

Question 239188: 20x^11 divided by 30x^7
30y^8 30y^4

Click here to see answer by checkley77(12569)

Question 239224: In 1993, the life expectancy of males in a certain country was 66.3 years. In 1997, it was 69.6 years. Let E represent the life expectancy in year t and let t represent the number of years since 1993.
The linear function E(t) that fits this data is?
E(t)=_t+_
Use the function to predict the life expectancy of males in 2004.
E(11)=_
Click here to see answer by ankor@dixie-net.com(15632)

Question 239276: writee an equation of the line containing the given point and parallel to the given line(4,-6);3x-7y=6
Click here to see answer by anantha(86)

Question 239275: give the given function g described by g(x) = 5x, find each of the following: (a) g(-10)= (b)g(6)= (c) g(32)=
Click here to see answer by anantha(86)

Question 239270: Find the vertical asymptote(s) of the function: = 3x^2 + 13x - 10/ x^2 + x - 20
Thank You!
Click here to see answer by Photonjohn(42)

Question 239315: Let f(x)=x^2-x-2 and g(x)=2x-7
Evaluate the following (f-g)(-1)
Click here to see answer by jsmallt9(3296)

Question 239601: 3yZ=27
Click here to see answer by Alan3354(30982)

Question 239603: 2X2-3=5
Click here to see answer by rfer(12646)

Question 239603: 2X2-3=5
Click here to see answer by checkley77(12569)

Question 239720: analyze the graph of the function:
R(x)= x^4+x^+10/x^2-100
What is the domain of R(x)
what is the equation of the vertical asymptotes of R(x)
wthat is the equation of the horizontal or oblique asymptote of R(x)
Click here to see answer by edjones(7569)

Question 239750: Please help me solve this problem... Suppose B is a proper subset of c, n(c)=8 what is the maximum number of elements in b?
What is the least possible number of elements in b?
Click here to see answer by solver91311(16868)

Question 239705: PLEASE, PLEASE HELP ME!!!
Given determine a and b so that i is a zero of the quartic.

THANK YOU FOR ANY HELP YOU CAN GIVE!!!!
Click here to see answer by edjones(7569)

Question 239995: I need to find the domain of the function algebraically and support my answer graphically.
f(x)= x^2+4

Click here to see answer by checkley77(12569)

Question 240132: How would you express each in terms of a reference angle.? :
1. co tangent of 285 degrees
2. secant of -105 degrees
3. co secant of 600 degrees
4. tangent of 3
5. tangent of 820 degrees
Click here to see answer by stanbon(57231)

Question 240238: is 8y=7+3x a function
Click here to see answer by vleith(2825)

Question 240477: what are the values of this expression:
f(3)+h(4)
Click here to see answer by solver91311(16868)

Question 240536: For the quadratic function find the vertex, and x-intercept, y-intercept.
g(x)=x^2-6x+13
I have the vertex (3,4), but I'm having trouble finding the x and y intercepts.
(x-3)^2+4 (this is what i used to find the vertex)
Click here to see answer by scott8148(6628)

Question 240576: how do you solve the algebra excluding value for
6x-24
_______
x-4

Click here to see answer by College Student(505)

Question 240578: excluding values
3x
_______
7x+21

Click here to see answer by rapaljer(4667)

Question 240654: Which of the following does not express y as a function of x?
A. y = |x − 3|; B. y = −3; C. x = y; D. x = y^2 + 4; E. none
Click here to see answer by jsmallt9(3296)

Question 240748: 4,-5;
a.x=4
is 4 a zero of the polynomial?
b.x=-5
is -5 a zero of the polynomial?
Click here to see answer by solver91311(16868)

Question 240769: i'm confused as to how to do these problems. for example : what is 80% of 14? or 15 is what percent of 45?
Click here to see answer by edjones(7569)

Question 240769: i'm confused as to how to do these problems. for example : what is 80% of 14? or 15 is what percent of 45?
Click here to see answer by jsmallt9(3296)

Question 240747: Given
a.Find the remainder when f(x) is divided by x+2
b.Find f(-2)
Click here to see answer by jsmallt9(3296)

Question 240795: Find a polynomial function of degree 3 with -2, and 7i as zeros.
Click here to see answer by vleith(2825)

Question 240795: Find a polynomial function of degree 3 with -2, and 7i as zeros.
Click here to see answer by jsmallt9(3296)

Question 240795: Find a polynomial function of degree 3 with -2, and 7i as zeros.
Click here to see answer by stanbon(57231)

Question 240867: evaluate the function at the given values.
f(x)=7
a)f(10)=
b)h(-10=)
c)f(0)=
Click here to see answer by Alan3354(30982)

Question 240869: solve:|x|=8
Click here to see answer by Alan3354(30982)

Question 240868: solve the inequality; identify if the inequality has no solution, or if the inequality is true for all real numbers: 4x-4<4(x-5)
Click here to see answer by checkley77(12569)

Question 240897: How to rewrite this equation so that y is a function of x
14=14x+y
Click here to see answer by stanbon(57231)

Question 240964: Give that the polynomial function has the given zero, find the other zeros.
f(x)= -3 is a zero.
Click here to see answer by Edwin McCravy(8880)

Question 241259: how long will it take for $1000 to grow to $42,900 at an interest rate of 10.6% if the intrest is compounded continuously? Round the number of years to the nearest hundredth.
i got 35.46 years and 3546.11 years

which is correct? :)
Click here to see answer by stanbon(57231)

Question 241258: how long will it take for the population of a certain country to double if its annual growth rate is 3.3%? round to the nearest year.

i got 21 and 9 years
my freind got 61 and 1
which is correct? :)
Click here to see answer by stanbon(57231)

Question 241257: find the inverse of the function...... f(x)= 1/7x +6

i got 2 different answers A. f^-1(x)=7x+42 B. f^-1(x)= 1/7x -6
which one if either is correct?
Click here to see answer by stanbon(57231)

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