# 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 462226: 116. Grade of a Highway The grade x of a hill is a measure of the steepness and r responds to the slope of the highway. The accompanying figure shows a grade of x= 10/100 = 10% because the road rises 10 feet for every 100 feet of horizontal run. The braking distance D in feet for a car traveling 60 miles per hour on a wet uphill grade is given by D(x) = 3600/30x + 9 (b) Find the grade x for a braking distance of 300 feet Click here to see answer by stanbon(57222)

 Question 462253: In this problem find domain of each function is what it says to do f(x)=4x+7 Click here to see answer by richard1234(5390)

 Question 462256: Amy paid \$82.49 for a pair of running shoes during a 25% percent off sale. What was the regular price? Click here to see answer by rfer(12644)

 Question 462330: for the function 2y = 7x + 2, what numbers are needed to complete the table below? Click here to see answer by math-vortex(472)

 Question 462797: Graph the equation using the slope and y intercept y=9/5x+7 Click here to see answer by MathLover1(6614)

 Question 462906: g(x)=10/1-7x I need to choose a domain from the following: x is a real number and (choose one of the answers below) x is not equal to 1/7 x is not equal to 10 x is not equal to 0 x is greater than or equal to 1/7 I don't have any idea how to solve this. Please help me. Thank you. Click here to see answer by Gogonati(809)

 Question 462960: Let f(x) = x^2 - 4 and g(x) = -3x^2. Find g(f(x))... This is a multiply choice question on an assignment. At first, I got the answer -3x^4 - 48 But the answer key said it was -3x^4 + 24x^2 - 48 I have no idea how 24x^2 got in there. Can you solve this? Click here to see answer by scott8148(6628)

 Question 463017: If f(4) = 0 and f(6) = 6, which of the following could represent f(x) ? Click here to see answer by richard1234(5390)

 Question 462998: What is the domain of the function? y=Square root of 3x-4 Click here to see answer by robertb(4012)

 Question 463211: I need to find the domain of f(x) = 3x – 9 4x + 20 Click here to see answer by edjones(7569)

 Question 463494: Consider the functions f(x) = 4x + 2 and g(x) = 5x − 2. What is the value of ( f over g )(4)? Click here to see answer by Gogonati(809)

 Question 464231: what is the domain and range of f(x)=3x-4? and please show me the solution for my guides. Click here to see answer by richard1234(5390)

 Question 464352: Find the function (do not submit a graph) that is finally graphed after the following transformations are applied to the given function. Please be sure to show all of your work. f(x)= 1/x Shift left 1 unit, shift up 3 units, reflect about the y-axis. Click here to see answer by stanbon(57222)

 Question 464359: Given f (x) = –^x2 + x + 2 and g(x) = square root2x+3 , find the following: a. f g(x), find the domain b. f g(3) c. f f(x), find the domain Click here to see answer by stanbon(57222)

 Question 464346: Is the relation below also a function? {(4.66, -1), (4.6, 9), (4, 11), (-4, -1)} Click here to see answer by stanbon(57222)

 Question 464351: Find the average rate of change for f(x)= 4x² from 0 to 7/4 and the equation of the secant line containing (0, f(0)) and (7/4, f(7/4)). Please show all of your work. Click here to see answer by stanbon(57222)

 Question 464430: Find the average rate of change of fx=x²+7x-4 from x to x+h . Please show all of your work. Click here to see answer by Gogonati(809)

 Question 464434: Given the function f(x)=-2(x+6)²+14 complete the following. Please show all of your work. (1)If ,fx=14 what is x ? (2)What point(s) from part (i) are on the graph of f? (3)List the x-intercepts, if any, of the graph of f. (4)List the y-intercept, if there is one, of the graph of f. Click here to see answer by richard1234(5390)

 Question 464350: For the given functions f and g, find the requested function. Please show all of your work. f(x) = 6x + 9; g(x) = 3x + 2 find f.g Click here to see answer by richard1234(5390)

 Question 463973: I have a question regarding completing the square. There is no graphing involved, I promise! A problem reads: Let f(x)=x^2-16x and g(x)=a-x. There are two values of "a" so that the graph of f o g crosses the y-axis at 0. Find the two values. Obviously you won't have to graph this. We just have to find where x=0. So we plug that into g(x), and the result is "a". Plugging that into f(x), we get a^2-16a. From there I'm lost, because I don't know how to complete the square. Little help here? Thanks, Jessica Click here to see answer by richard1234(5390)

 Question 463777: Domain and range of x-4y^2=0 and its graph Click here to see answer by robertb(4012)

 Question 463722: can you help me with the domain for the expression written in interval notation for this problem? sq rt of 8-4x. thanks Click here to see answer by lwsshak3(6463)

 Question 465032: annual profit in thousands of dollars is given by the function, P(x)=5000-(1000/x-1)), where x is the number of items sold in the thousands, x>1. question: describe the meaning of 5000 in the equation and describe the number of 1 in the equation. i think the 5000 is the total profit???? and i have no clue what the 1 is for... Thank you for your time. Click here to see answer by solver91311(16868)

 Question 465220: State whether the following function is increasing, decreasing, or constant. f(x) = -1 Click here to see answer by ewatrrr(10682)

 Question 465221: Given the following quadratic equation, determine if it has a maximum or a minimum value. Then find the maximum or minimum value. Please show all of your work. f(x) = -2x²+2x Click here to see answer by MathLover1(6614)