# 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 67035: If f(x) = 5x - 1, Find the following: f(a - 2). I am having some difficulty understanding how to solve this problem. I am trying to do other ones but if I could get someone to show me how to work this one, I could problably get through the rest of them with no problems. Click here to see answer by Earlsdon(6287)

 Question 67034: If f(x) = 4x - 3, find the following: f(-1) I am not getting this. I was hoping someone could help me with these types of exercises. Any help would be greatly appreciated. Thanks Click here to see answer by stanbon(57219)

 Question 67098: Determine the correct half-plane, and complete the graph: y > 3 : The graph has a broken horizontal line going across the graph at the 3 point mark on the graph. Any help with this would be very much appreciated. Thanks. Click here to see answer by stanbon(57219)

 Question 67108: what is the domain of these sets of numbers {(-3,5),(1,3),-5,-6)} Click here to see answer by stanbon(57219)
 Question 67108: what is the domain of these sets of numbers {(-3,5),(1,3),-5,-6)} Click here to see answer by chitra(359)

 Question 67126: find an equation of the line containing the point (-1,3) and parallel to the line x+2y=-6 Click here to see answer by venugopalramana(3286)
 Question 67126: find an equation of the line containing the point (-1,3) and parallel to the line x+2y=-6 Click here to see answer by Earlsdon(6287)

 Question 67125: find the slope and the y intercept of the graph of -3x+ 2y=5 Click here to see answer by venugopalramana(3286)

 Question 66981: Solve the following equation. Be sure to check your answer by plugging your answer back into the equation. (sqrt2y+7)+4=y I have gotten to the quadratic equation of y^2-10y+9=0, but I am stuck at that point. Can someone please lend me a hand here. Thanks. Click here to see answer by rapaljer(4667)

 Question 67437: If you are given a function's graph, how do you determine if the function is even, odd, or neither? Click here to see answer by venugopalramana(3286)

 Question 67591: step by step how would u do a problem like 1/2y-2/3=7/8 Click here to see answer by checkley71(8403)

 Question 67592: which of the following is a factor of the polynomial x^2-x-20 Click here to see answer by checkley71(8403)

 Question 66931: Given f(x)=-3x(-3)+5, what is the range of the function? Click here to see answer by stanbon(57219)

 Question 67734: 36 times one-sixth squared plus 36 times one-sizth minus 9 squared Click here to see answer by ptaylor(2048)

 Question 67829: Find the coordinates of the vertex, then give the equation of the axis of symmetry and the least value of the function. 7) f(x)= x(squared) - 5 12) F(x)= 1/4x(squared) Find the coordinates of the vertex. Then give the equation of the axis of symmetry and the greatest value of the function. 13) g(x)= -x(squared) - 3x 17) f(x) = x - 2x(squared) Click here to see answer by venugopalramana(3286)

 Question 67914: If g(x) = -6x-3 find: 1. g(3) 2. g(-2) Thank you! Click here to see answer by funmath(2925)

 Question 67959: Business and finance. If the inventor in exercise 53 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? Click here to see answer by venugopalramana(3286)

 Question 67978: How do I evaluate each function for the value specified. f(x) = x 2 - 7x +10; find (a) f (0), (b) f (5), and (c) f (2). Click here to see answer by funmath(2925)

 Question 67980: How do I rewrite each equation as a function of x. -3x + 4y = 11 Click here to see answer by tutorcecilia(2152)
 Question 67980: How do I rewrite each equation as a function of x. -3x + 4y = 11 Click here to see answer by venugopalramana(3286)

 Question 67960: How do I rewrite this equation as a function of x. -3x + 4y = 11 Click here to see answer by adamchapman(301)

 Question 67949: 2. f(x) = x 2 - 7x +10; find (a) f (0), (b) f (5), and (c) f (2). Click here to see answer by tutorcecilia(2152)

 Question 68123: Given f(x) = 5x^2 - 3x + 1, find f(-2). a)-13 b)15 c)-25 d)27 I have tried to work this problem and just can't seem to find the f(-2) can someone please help with this. Thanks Click here to see answer by Earlsdon(6287)

 Question 67894: solve. if the domain is{-1,0,2,4}. Graph the solution set for y=-x Click here to see answer by ankor@dixie-net.com(15624)

 Question 68266: If f(x)=-1, what is x? What point(s) areon the graph of f. Click here to see answer by Nate(3500)

 Question 68389: find the slope of a line that is perpendicular to the following lines. y=-1/5x-7 Click here to see answer by rmromero(383)

 Question 68504: Can someone please do this just so i can compare it to mine to see if i'm doing it right. Use the definition of the derivative to find: a) y=5x^2+3x b) y=(x^3-2)/x Click here to see answer by stanbon(57219)

 Question 68456: A Norman window is in the shape of a rectangle surmounted by a semicircle, as shown in the figure. Assume that the perimeter of the window is 32 feet. Express the area of the window as a function of r, the radius of the semicircle. Write your answer using function notation and simplify the function to three terms. Leave pi in its exact form. I'm having diffficulty setting this problem up could you assist me. Any help is greatly appreciated. Thanks, Bridget Click here to see answer by ankor@dixie-net.com(15624)

 Question 68533: Is this a function? f(x)=2 if x>1 f(x)=-1 otherwise Click here to see answer by Edwin McCravy(8879)

 Question 68753: I understand the function of a domain when f(x) is given along with the equation, but I do not understand how to find the domain of the function. f(x)=1-2x^2 f(x)=3^sqrt y-10 f(x)=4^sqrt x+1/x-2 Thank you for your help!!!!! Christopher Click here to see answer by venugopalramana(3286)

 Question 68854: 3. Take a look at the table below and write out an equation for f(x). x -2 -1 0 1 2 f(x) -5 -2 1 4 7 Click here to see answer by Edwin McCravy(8879)

 Question 68852: Suppose you have a lemonade stand, and when you charge 2 dollars per cup of lemonade you sell 120 cups. But when you raise your price to 3 dollars you only sell 60 cups. Write an equation for the number of cups you sell as a function of the price you charge. Denote "C" for the number of cups, and "P" for the price you charge. Assume the function is linear. Click here to see answer by josmiceli(9649)

 Question 69276: f(x) = 5x squared - 3x + 1 find f(-2) Click here to see answer by checkley75(3666)

 Question 69260: Can you please help with this, I do not know what book it came from.There are actually squares around these numbers to form a table. Take a look at the table below and write out an equation for f(x). x -2 -1 0 1 2 f(x) -5 -2 1 4 7 Click here to see answer by ankor@dixie-net.com(15624)

 Question 69337: Write a function using this form. y=ab^x and these points (2,56)(0,3.5) Click here to see answer by Nate(3500)

 Question 69355: Rewrite the equation 4x – 6y = –30 as a function of x. Click here to see answer by checkley75(3666)

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