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

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Question 698361: Determine if the function is bounded above, bounded below, bounded on its domain, or unbounded on its domain. y=3-x^2
Click here to see answer by Positive_EV(69)

Question 698694: f(-10) if f(x)=|x|-3
Click here to see answer by sofiyac(983)

Question 698718: the sum of the digits of a 2 digit number is 13 if the digits are reversed the number is 27 less than the original number find the original number
A)76
B)95
C)94
D)85
Click here to see answer by MathLover1(20850)

Question 698716: whats 1-2?
Click here to see answer by rfer(16322)

Question 698798: Find the value of c such that the domain of f(x) = sqrt(c-x^2) is [-13,13]
Click here to see answer by MathLover1(20850)

Question 698717: Hi, I need help with a simplification that I need to do every time in a certain type of problem
I basically need to go from equations in the form to equation in the form
I need a detailed way to go from the first to the second
Another one would be
Click here to see answer by KMST(5328)

Question 697961: What is the formula for finding the nth term in an arthematic sequence
Click here to see answer by KMST(5328)

Question 699371: Function or Not a Function
{(-2,-7),(3,-5),(6,-4),(9,-6),(10,-1)}

Click here to see answer by MathHard(1)

Question 699371: Function or Not a Function
{(-2,-7),(3,-5),(6,-4),(9,-6),(10,-1)}

Click here to see answer by stanbon(75887)

Question 699368: Function or Not a Function

x+y=9
and
x^2+y^2=1
and
x=y^2
Click here to see answer by lwsshak3(11628)

Question 699378: Function or Not a Function
x+y=9
and
x^2+y^2=1

Click here to see answer by MathLover1(20850)

Question 699751: how do you rewrite the equation 2+6y=3x+4 so that y is a function of x?
Click here to see answer by solver91311(24713)

Question 700225: how do you solve f(x)= x6 - 1
where x6 is x to the sixth power, I have found -1 and 1 as solutions but there are 4 more
Click here to see answer by josmiceli(19441)

Question 700275: Let f(x)=x-2/4 and g(x)=2x^2+4 Find f(g(x)) and Find g(f(x))
Click here to see answer by solver91311(24713)

Question 700534: i have to maximise the revenue function
R(x)=385x-0.9x^2
Click here to see answer by josmiceli(19441)

Question 700786: (x+5)^2 = -81. What is the final simplified problem? I came up with x=-14, x=-4 but i also got x=-5+9i. I am confused which answer i should have. Thank you for your help
Click here to see answer by RedemptiveMath(80)

Question 700897: Find an equation of a line in standard form that passes through (3,2) and is parallel to
a) y = (1/2)x
b) x-axis
c) y-axis
thank you!
Click here to see answer by mouk(232)

Question 701039: An automobile purchased for use by the manager of a firm at a price $24,000 is to be depreciated using the straight line method over 5 years. what will be the book value of the automobile at the end of 3 years? (assume the scrap value is $0). THANKS
Click here to see answer by checkley79(3341)

Question 701056: sin(2x+π/2)
I need the aplitude, period , frequency, phase shift

Click here to see answer by lwsshak3(11628)

Question 701056: sin(2x+π/2)
I need the aplitude, period , frequency, phase shift

Click here to see answer by stanbon(75887)

Question 701044: In 2005, national textiles installed a new machine in one of its factories at a cost of $250,000. The machine is depreciated linearly over 10 years with a scrap value of $10,000.
a) find an expression for the machines book value in the t^th year of use.
b) sketch the graph in a.
c) find the machines book value
d) find the rate at which the machine its being depreciated.
Click here to see answer by lynnlo(4176)

Question 701062: State if:
A. if it is exponential or decay
B. the rate of growth or decay
C. the y-intercept
h(x)=6(3)^x
Click here to see answer by Alan3354(69443)

Question 700813: What is the domain and range of g(x)=2*(x+3)^2?
Click here to see answer by jim_thompson5910(35256)

Question 697959: Given that g(x)=3x^2+2x+3, find each of the following.
A) g(-1)
B)g(p+2)
Click here to see answer by jim_thompson5910(35256)

Question 701278: find the equation of a line that passes through the point (-1,3) and is parallel to the line passing through the points (-2, -3) and (2,5). THANKS
Click here to see answer by MathLover1(20850)

Question 700509: If f(x) = x - 2, for what value of x does f (3x) = f(x+1)?
Click here to see answer by jim_thompson5910(35256)

Question 701268: The quantity demanded for a certain brand of portable CD players is 200 units when the unit price is set at $90. The quantity demanded is 1200 units when the unit price is $40. Find the demand equation and sketch its graph. THANKS
Click here to see answer by josmiceli(19441)

Question 701329: find the equation of the circle with centre (-a,a) and radius 2a.
Click here to see answer by jim_thompson5910(35256)

Question 701383: how do you find the domain of f(x) y+6 / y2-6y
Click here to see answer by jim_thompson5910(35256)

Question 701617: Determine "d" so that the slope of CD is undefined if C and D are the points (d,3) and (-5,5) respectively.
I realize to have an undefined slope I need a number with 0 as the denominator but am having a hard time setting it up. I know I need to use m = y2-y1/x2-x1 so I have 5-3/-5-d put to turn it into an equation where I can cross multiply I'm stuck. So I'm stuck at 2/-5-d=x/0 but can I just put any number over 0 rather than x?
Click here to see answer by reviewermath(1029)

Question 701625: I'm given a table of x and y values and I need to identify the type of function. Can you help?
x values - 2 3 4 5 6 7
y values - 5 10 17 26 37 50
Click here to see answer by jim_thompson5910(35256)

Question 701650: I need help with solving this problem:
Directions: Let f(x)=x^2 and g(x)=3x+7. Find the following composites.
#1. f(g(-2))
#2. f(g(x))
I have tried solving them over and over, but I keep getting the wrong answer. For #1 I get -2x^2. For #2 I get 3x^3+7x^2. I know those answers are not right and I need help, please!
Click here to see answer by Alan3354(69443)

Question 701712: State if:
A. if it is exponential or decay
B. the rate of growth or decay
C. the y-intercept
g(x)=75(1.07)^x
Click here to see answer by jim_thompson5910(35256)

Question 701711: State if:
A. if it is exponential or decay
B. the rate of growth or decay
C. the y-intercept
f(x)=123(0.95)^x
Click here to see answer by jim_thompson5910(35256)

Question 701877: What is the decay rate in the function A(t)=0.8(0.65)(to the power of t) ?
Click here to see answer by solver91311(24713)

Question 701908: 6(x+9)=
7(6x-8)=
x(x+2)=
Click here to see answer by MathLover1(20850)

Question 701913: State the domain in interval notation
g(x)=x+7/x^2-25
I know x cannot equal +-5, after that im lost please shpw me how to get the answer.
Thanks
Click here to see answer by josgarithmetic(39618)

Question 701989: what is the answer to g (-6)
Click here to see answer by Alan3354(69443)

Question 701916: Let g(x)={x-2 x < -6
{4x+5 -6 < = x < 1
{1/2x^2 x >= 1
evaluate:
a. g(-6)
b. g(6)
c. g(1)
d. g(-8)
Thank You
Click here to see answer by jim_thompson5910(35256)

Question 702055: Hi I got a math exam review packet and don't understand this question! Please help
1. find the range of f(x)=-x+22 for the domain {-8,-6,4,7}
Click here to see answer by RedemptiveMath(80)

Question 702249: f(x)=x+7what is the domain of each function
Click here to see answer by jim_thompson5910(35256)

Question 702335: what is the domain of f(x) = x� + 4x� - 12x
Click here to see answer by Edwin McCravy(20056)

Question 702357: I have to use a graph of g to answer the questions. Assume the domain of g is [-4,4].
what does g(4)=?
what does g(-2)=?
For how many values of g does g(x)=.08?
For what value(s) is g=0?
Click here to see answer by solver91311(24713)

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