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

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Question 56997: The sum of two numbers is 24. Seven times the smaller number is the same as 5 times the larger number. Find the smaller number.
Click here to see answer by rchill(405)

Question 57028: please help with this problem 2x = -3y + 10 (please explain each step and explain why you do what you do for each step) I am having trouble grasping this. THANK YOU
Click here to see answer by stanbon(75887)

Question 56994: Keith weighs 20 kg more than Beth, while Henry weighs 30 kg less than twice as much as Beth. If Keith and Henry weigh the same, how much does Beth weigh (in kg)?
Click here to see answer by ankor@dixie-net.com(22740)

Question 56996: Cycly Paths, Inc. makes bicycles, tricycles, and unicycles. Last week they made 88 more bicycles than unicycles, and 5 times as many tricycles as unicycles. If they made 40 more bicycles than tricycles, how many unicycles did they make?
Click here to see answer by stanbon(75887)

Question 57054: Rewrite the equation so that y is a function of x
Please explain and show work on each step so that I will fully understand this for the future problems that I have. THANK YOU!
3(x-2y) = -12(x+2y)
Click here to see answer by josmiceli(19441)

Question 57074: the elctrical resistance R of a wire varies directly as its length L and inversely as the sqaure of its diameter. A wre 20 meters long and 0.6 centimeters in diameter made from a certain alloy has a resistance of 36 ohms. what is the resistance of a pice of wire 60 meters long and 1.2 centimeters in diameter made from the same material?
Click here to see answer by venugopalramana(3286)

Question 57073: express the following statement as a formula with the value of the constant of proportionality determined with the given conditions: w varies directly as x and inversely as the square of y. if x=15 and y=5, then w=36.
Click here to see answer by venugopalramana(3286)

Question 57099: Is (x-2) a factor of 3x^4+6x^3-30x^2+16x-8? Why or Why not?

Click here to see answer by stanbon(75887)

Question 57104: i am going to a job that uses simple algebra deal in conveting factions of inches to decemial points where can i go to get help on that
Click here to see answer by tutorcecilia(2152)

Question 57051: hlep with formulas
Click here to see answer by amoryjade(2)

Question 57130: what iz y=2x+1 in algebra 1
Click here to see answer by tutorcecilia(2152)

Question 57103: i am going to a job that uses simple algebra deal in conveting factions of inches to decemial points where can i go to get help on that
Click here to see answer by checkley71(8403)

Question 57173: what is the function rule if:
x y
-2 = -2
0 = 1
y=???
Click here to see answer by stanbon(75887)

Question 57178: what is the function rule if:
x f(x)
-1 0
-2 7
-3 26
-4 63
Click here to see answer by stanbon(75887)

Question 57192: well i dont not understand any questions that look like this :

" solve each equation if the domian is (-2,-1,1,3,4)...Question numer 24: 6x-3y=18"
ok i did try and i tried making a graph but when i went to check my answer it didn't come out right... I've missed school now for a week because my arms broke witch i regret, thats why i don't understand this if you don't understand wut i wrote lett me know thanks
Click here to see answer by stanbon(75887)

Question 57301: Could someone help me understand and work this problem please?
Given that one zero is 1, which of the following is not a zero of f(x)?
f(x)= x^3-4x^2-15x+18
Click here to see answer by venugopalramana(3286)

Question 57245: x+25=y-3x-195.
Click here to see answer by tutorcecilia(2152)

Question 57306: The ordered pairs are for the same direct variation. Find each missing value.
(-1,2) and (4,y)
How would you do that?? would y be 7 because the difference between -1 and 2 is 3, and 4+3=7???
Click here to see answer by funmath(2933)

Question 57239: the period of a simple pendulum is directly proportional to the square root of it's length. if a pendulum has a length of 6ft and a period of 2 sec, to what length should it be shortened to achieve a 1 second period?
Click here to see answer by aaaaaaaa(138)

Question 57305: Direct variation: true or false
If you triple an x-value of a direct variation, the y-value also triple.
true of false?? Explain.
I put true becausein y=kx, lets say y=2,k=1,and x=3. If the 3 is tripled, it would become 9, causing the y (or 2) become 6 and also triple. Is this correct???
Click here to see answer by funmath(2933)

Question 57304: this question has to do with direct variation:
The graph of a direct variation may pass through (-2,4)
True or false. Explain
I think its true because couldn't direct variations be any ordered pairs but 0?? Could I get confirmation on this?
Click here to see answer by stanbon(75887)

Question 57438: Please help...
Find the domain and range of the function F(t)= -t^2+4t+10
Click here to see answer by Nate(3500)

Question 57438: Please help...
Find the domain and range of the function F(t)= -t^2+4t+10
Click here to see answer by venugopalramana(3286)

Question 57463: Can someone please help me on the following problem?
I need to evaluate this function for the value specified.
f(x) = x^2 - 7x + 10; find (a) f(0), (b) f(5), and (c) f(-2).
Thank you,
sher
Click here to see answer by rcmcc(152)

Question 57468: Can someone help me on this problem?
If f(x) = 5x - 1, Ifind the following:
f(a-2)
Thanks,
Ashley
Click here to see answer by Nate(3500)

Question 57468: Can someone help me on this problem?
If f(x) = 5x - 1, Ifind the following:
f(a-2)
Thanks,
Ashley
Click here to see answer by Earlsdon(6294)

Question 57467: Can someone help me with this problem?
If f(x) = 4x - 3, I need to find the following:
f(-1)
Thanks,
Ashley
Click here to see answer by Nate(3500)

Question 57469: Can someone help me on this problem?
If the inventor charges $4 per unit, then her profit for producing and selling x units is given by the function:
P(x) = 2.25x - 7000
(a) What is her profit if she sells 2000 units?
(b) What is her profit if she sells 5000 units?
(c) What is the break-even point for sales?
Thanks,
Ashley
Click here to see answer by Nate(3500)

Question 57465: Can someone help me on this problem?
I need to rewrite the following equation as a function of x.
-3x + 4y = 11
Thank you,
Ashley
Click here to see answer by Nate(3500)

Question 57465: Can someone help me on this problem?
I need to rewrite the following equation as a function of x.
-3x + 4y = 11
Thank you,
Ashley
Click here to see answer by rcmcc(152)

Question 57473: Please help me figure this problem!
Rewrite the equation so that y is a function of x
-2y+10x=8
Click here to see answer by ChillyWiz(11)

Question 57476: 1). If f(x) =2x2+1 and g(x)=x-3, find (f o g)(x).
a. (f o g)(x) = 2x 2 - 17
b. (f o g)(x) = 2x 2 - 12x + 19
c. (f o g)(x) = 2x 2 - 2
d. (f o g)(x) = 2x 2 - 12x + 13
2). Is the graph of y=x2+5 symmetric with respect to the origin, the x-axis, the y-axis, or the line y = x?
a. the x-axis
b. the y-axis
c. the origin
d. the line y = x

Click here to see answer by funmath(2933)

Question 55876: please help simplify x-3/x-6-x-5/x+5
Click here to see answer by faceoff57(108)

Question 57593: My question is not in my book, it is on a hand out.
The question is......
find the slope and y-intercept of the line given by 2x-3y=5
I came up with y=-2/3x+5....is this the correctanswer -2/3;(0,-5/3)
Click here to see answer by stanbon(75887)

Question 57657: Determine whether the following functions are inverse.
f(x) = (8x+9)/8
g(x) = (10x-7)/8
I am unable to solve.

Click here to see answer by funmath(2933)

Question 57656: Determine whether the following functions are inverse.
f(x) = (8x+9)/8
g(x) = (10x-7)/8
I am unable to solve.

Click here to see answer by hayek(51)

Question 57731: The question says find the domain of (-2,-1,0,2,5)
1.y=3x+2
does that mean replace x with each of the numbers in parenthasis? Wouldn't that be solving for x? Can domains be negative? How would you express the answer? In parenthasis with each answer seperated by a comma?

Click here to see answer by stanbon(75887)

Question 57796: Form a polynomial whose zeros and degree are given.
Zeros: 0, -3, 2
Degree: 3
Click here to see answer by Cintchr(481)

Question 57798: For the polynomial, list each real zero and its multiplicity. Determine whether the graph crosses or touches the x-axis at each x-intercept.
f(x) = (x + 1/5)^2(x^2 + 5)^3
Click here to see answer by stanbon(75887)

Question 57793: Given f(x)=(x+1)^2(x-1)(x+2)(x+4)^3
a.) Find the x- and y- intercepts of f.
b.) Determine whether the graph touches or crosses the x-axis at each x-intercept. How do you do this without graphing f?
c.) What power function does f resemble for very large values of |x|?
Click here to see answer by stanbon(75887)

Question 57794: Determine the domain and range of the function -x^2 + 6x - 8.
Click here to see answer by funmath(2933)

Question 57880: Can someone help me on this problem?
I need to evaluate the function on this problem for the value specified.
f(x) = x^2 - 7x + 10; find (a) f(0), (b) f(5), and (c) f(-2).
Thanks so much,
Sher
Click here to see answer by funmath(2933)

Question 58000: Can someone help me on this problem?
I need to rewrite the following equation as a function of x.
-3x + 4y = 11
Thanks so much,
Sher
Click here to see answer by rcmcc(152)

Question 58009: Determine the domain and the range of the function
f(x) = x^2 - 12x + 36
Click here to see answer by rcmcc(152)

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