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

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 Algebra: Functions, Domain, NOT graphing Solvers Lessons Answers archive Quiz In Depth

 Question 55729: Please solve so that Y is a function of X: -3x + 8y = 24 Click here to see answer by checkley71(8403)

 Question 55891: Composite Functions Given f(x)=x^2-3x+4 ; g(x)=x+2 Find (f o g )(x) (g o f )(2) Click here to see answer by funmath(2925)

 Question 55942: The Majik car rental company charges a flat fee of \$21 per day and a mileage charge of \$0.18 per mile. John rented an SUV for 6 days and he covered m miles during this period. Express the total charge as a function of m. I started with, f(m)=0.18*m+21*6, I am not sure where to go after that. Unless I can set the problem equal to 0 and solve for m. Any help would be greatly appreciated! Click here to see answer by Hook(36)

 Question 56023: f(x)=x^3 and g(x)=ax^3. what can you conclude about value of a?? I got 0 Click here to see answer by stanbon(57387)

 Question 56052: f(x) = x2 - kx + 9, where k is a constant find the set of values of k for which the equation f(x) = 0 has no real solutions I know that b2 - 4ac<0 has no real solutions Click here to see answer by venugopalramana(3286)

 Question 56065: Can any one please help me!!!! Evaluate the function for the value specified f(x)=x^of 2 -7x+10; find (a)f(0 ),(b) f(5), and (c)f(-2) Thank you so much for your help with this! McGraw Hill 6th edition, chapter 7.5, exercise # 2 Click here to see answer by jenrobrody(19)

 Question 56018: In a geometric sequence, a=120 and t4=19,965. Determine the common ratio r to the nearest tenth. Click here to see answer by stanbon(57387)

 Question 56093: Given f(x)= 2x-1 x<3 -2 x > or = 3 Evaluate f(1) Evaluate f(3) Evaluate f(5) Click here to see answer by stanbon(57387)

 Question 56078: This is a question on inverse functions. Let y=f(x)=5x^3+8 The question wants the answer in the form y= cube root a(x)+b. where a and b are coefficients. I have come up with 1/5 for coeffcient a and I am thinking -(8/5) for coefficient b, but it does not seem to work. Click here to see answer by rapaljer(4667)

 Question 56141: If the function f is defined by f(x)=3x+4, then 2f(x)+4=? Click here to see answer by funmath(2925)

 Question 56187: Given f(x) = 5x2 – 3x + 1, find f(–2) Click here to see answer by funmath(2925)

 Question 56663: Find the function that is finally graphed after the folowing transformations are applied to the graph of y=sqroot of x. 1. Shift up 3 units 2. Reflect about the y-axis 3. Shift right 2 units Click here to see answer by funmath(2925)

 Question 56606: Find the domain and range of square roott x^3-8x Click here to see answer by venugopalramana(3286)

 Question 56719: When working with domains and ranges and a question asks you to use a mapping diagram to represent the relation, how do you do that? I am unaware of how to make a 'mapping diagram'. Help! Click here to see answer by funmath(2925)

 Question 56718: if P(4,-5) is apoint on a graph of the function y=f(x), find the corresponding point onthe graph of y=2f(x-6) Click here to see answer by stanbon(57387)

 Question 56698: Assume the cost of a company picnic is described by the function P(n)=(1/2)n^2-10n+80 where n represents the number of employees and family members attending the picnic and P (in dollars) represents the cost of the picnic. How many employees and guests in attendance produce a minimum cost? What is the minimum cost for this event? Click here to see answer by ankor@dixie-net.com(15660)

 Question 56864: 1) Solve the following equations. a) sqrt x -2=1 Answer: Show work in this space. b) sqrt x³ =27 Answer: Show work in this space. c) 3sqrt x2 =9 Answer: Show work in this space. thank you Click here to see answer by Scriptor(36)

 Question 56892: Good morning, I have been working on this problem..F(x)=sq rt of 2x-x/2 and x=t. I have this so far but i dont know if im headed in the right direction or not. F(t)=sq rt of 2(t)-t/2 F(t)=sq rt of 2 times sq rt of t-t/2 and thats as far as i have gotten but i dont know if i am on the right track. I would appreciate your help very much. Thankyou and have a good day!!! Click here to see answer by stanbon(57387)

 Question 56925: I honestly have no idea how to answer this problem. It's not from a book, my teacher made it up. f(x)=x+4 find (f(x))^2 I wrote down (x+4)^2 which equals x^2+16 just to have an answer. I'd rather have an example problem like this one so I could learn from that instead of just having a correct answer. Thank you! Click here to see answer by stanbon(57387)
 Question 56925: I honestly have no idea how to answer this problem. It's not from a book, my teacher made it up. f(x)=x+4 find (f(x))^2 I wrote down (x+4)^2 which equals x^2+16 just to have an answer. I'd rather have an example problem like this one so I could learn from that instead of just having a correct answer. Thank you! Click here to see answer by funmath(2925)

 Question 56810: the degree 3 polynomial f(x) with real coefficients and leading coefficents 1, has 4 and 3+i among its roots. express f(x) as a product of linear and quadratic polynomials with real coefficents. Click here to see answer by ankor@dixie-net.com(15660)

 Question 56999: I have the answer I do not know how to get it. I have to rewrite the equation so that y is a function of x. The equation is 9-y=1.5x Click here to see answer by rchill(405)

 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(57387)

 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(15660)

 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(57387)

 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(9697)

 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(57387)

 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 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(57387)

 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(57387)

 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(57387)

 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)