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

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 Question 734214: If there are four variables A,B,C,D. Is there anyway that we can simplify the following function (A+B)*(C+D) Click here to see answer by nerdybill(7090)

 Question 734202: find the domain of this real function and label it on a number line or express it in set notation f(x)= 9x-2/-5x+7 Click here to see answer by lynnlo(4174)

 Question 734412: The function of g is defined as g(x)=ax^2+b where a and b are constants. If g(2)=3 and g(-3)=13, find the values of a and b. Click here to see answer by rothauserc(643)

 Question 734613: hi there i was just wondering how to find the domain of the equation: Click here to see answer by josgarithmetic(3317)

 Question 734663: Write the following function in vertex form X^2+8X+2 Click here to see answer by nerdybill(7090)

 Question 734763: Use the functions to answer the question. f(x) = 4x-7; g(x) = x + 3 What is the value of (f°g)(4)? Click here to see answer by rothauserc(643)

 Question 734764: Use the functions to answer the question. f(x) = 2x+5;g(x)=3x^2 Which is equal to (f°g)(x)? Click here to see answer by stanbon(60778)

 Question 734761: Use the function to answer the question. f(x) = 10x-5 What is the value of f –1(–4)? Click here to see answer by stanbon(60778)

 Question 734767: Use the functions to answer the question. f(x)=x^2+3; g(x)=x-7 Which is equal to (f + g)(x)? Click here to see answer by stanbon(60778)

 Question 734766: The graph of g(x) results when the graph of f(x) = |x| is shifted 3 units to the left. Which is the equation of g(x)? Click here to see answer by stanbon(60778)

 Question 734942: Form a polynomial whose real zeros and degree are given. Type your answer in factored form using a leading coefficient of 1. Zeros: -4,0,8; degree: 3 Click here to see answer by MathLover1(7480)

 Question 735278: State the domain and range: 7. y = x2 + 86 8. y = 2x3 + 8 9. y = -9x + 11 10. y = 40 - 8x2 11. f(x) = 11x - 5x2 + 4 find f(-4) 12. f(x) = 7 - 5x + 7x2 find f(-9) 13. f(x) = -13x2 - 7x4 - 11x find f(5) 14. f(x) = 15x - 12 g(x) = -15x2 + 14x - 10 find g(g(7)) 15. f(x) = -13x2 + 12x + 14 g(x) = 11x - 13 find f(g(7)) 16. f(x) = 11x + 15 g(x) = -11x3 - 15x2 + 13x - 13 find g(f(6)) 17. f(x) = 15x3 + 13x2 - 15x + 15 g(x) = 15x + 11 find g(f(9)) 18. f(x) = -13x2 - 13x + 14 g(x) = -13x - 11 find g(g(3)) 19. f(x) = 15x + 12 g(x) = -10x + 15 find f(g(8)) Click here to see answer by lynnlo(4174)

 Question 735552: State the inverse of each relation. Is the inverse a function? 1. {(18, -3), (-13, -10), (-3, 17), (0, -15)} 2. {(5, -11), (-19, -19), (-6, -4), (-3, 8), (-12, 5)} 3. {(-9, -8), (-16, 5), (17, 6), (19, 4), (-8, 9), (-10, -10)} 4. {(8, -5), (-4, -14), (16, 12), (-13, 4), (-17, -2), (3, -13)} 5. {(-14, -9), (-0, 2), (8, -4), (-5, 6), (-7, -4)} 6. {(-15, -1), (0, -1), (-6, -1), (-16, 3)} 7. g(x) = (4/3)x - 7/3 8. h(x) = (18x + 2)/10 9. f(x) = (2/9)x - 1/9 10. f(x) = (-6x + 2)/5 11. g(x) = (5/8)x - 3/4 12. h(x) = (8x + 9)/8 13. h(x) = (-7/5)x - 1 14. f(x) = (9/8)x + 3/8 15. g(x) = (18x + -36)/30 Are f and g inverses of each other? Give your explanation to support your response. 16. f(x) = (2x + -6)/7 g(x) = (7/2)x + 3 17. f(x) = -(1/5)x + 3/5 g(x) = -5x + 3 18. f(x) = x + 1/2 g(x) = 1x - 1/2 19. f(x) = (63x + 42)/49 g(x) = (7/9)x - 2/5 20. Fahrenheit and Kelvin temperature scales are related by the formula K = 5/9 (F - 32) + 273. Solve this equation for F. Click here to see answer by MathLover1(7480)

 Question 735573: Use the function f(x) = 4x-8 What is the value of f –1(–2)? Click here to see answer by MathLover1(7480)

 Question 736070: What is the domain and range of f(x)= -ln(x-1)+2 Click here to see answer by solver91311(18785)
 Question 736070: What is the domain and range of f(x)= -ln(x-1)+2 Click here to see answer by MathLover1(7480)

 Question 736084: I have to solve x-6 over x+9 = 2 over 7. I know I have to find the LCD of x+9 and 7 but I don't know how to. Click here to see answer by solver91311(18785)

 Question 736241: How to do this because I have no idea ? Click here to see answer by Alan3354(34678)

 Question 736264: what is the relationship between x and y if: x=1,2,3,4,5 and y=3.75, 7.5, 11.25, 15, 18.75 Click here to see answer by MathLover1(7480)

 Question 736942: What is the domain and range of the following relation? { (-1,2), (2, 51), (1, 3), (8, 22), (9, 51) } Click here to see answer by nerdybill(7090)

 Question 737736: The domain of x is {-1, 0, 2}. Solve the equation: 6x - 0.5y = 3 Click here to see answer by josgarithmetic(3317)

 Question 737738: 4x + 3y = 8; (0,___); (___ ,0); (5,___) 4x + 3y = 8; (0,___); (___ ,0); (5,___) Click here to see answer by josgarithmetic(3317)

 Question 739812: DO you know how to write a function rule for the circumference of a circle C(r) when you know the radius r? Click here to see answer by fcabanski(1133)

 Question 739921: Write a rule for the function: Input:0, 1, 2, 3, 4 Output:9, 7, 5, 3, 1 Thanks! Click here to see answer by fcabanski(1133)
 Question 739921: Write a rule for the function: Input:0, 1, 2, 3, 4 Output:9, 7, 5, 3, 1 Thanks! Click here to see answer by MathLover1(7480)

 Question 739984: Hi u am practicing for exam can someone show me how i must find the Domain for this question Please.Thanks. s(x) square root 3-x/3x+2 Click here to see answer by Edwin McCravy(9717)

 Question 740457: I need help solving the following question. I believe this will turn into a fraction but I'm having issues. f(x)=x^2+x-5, find (f-g)(x) What I have so far is replacing the x's with f-g. f(f-g) = x(f-g)^2 + (f-g)- 5 At this point would the above info be my numerator with g being my demonimator or am I completly off base. Thanks Click here to see answer by rothauserc(643)

 Question 740816: State at least 2 similarities and 2 differences between logarithmic and exponential functions.? Hey i need help with this math question please. State at least 2 similarities and 2 differences between logarithmic and exponential functions. Thanks in advance Click here to see answer by stanbon(60778)

 Question 740857: what is the domain range and vertex of y = 2x^2-4+1 Click here to see answer by lynnlo(4174)

 Question 741092: Given f(x)=log x, give the appropriate notation for the noted shift, stretch, reflection, or combination. a) left 2 b) right 4 c) up 3 d) down 1 Thank you in advance!!! Click here to see answer by only4christ2(12)

 Question 741080: x | 0 | 1 | 2 | 3 | 4 f(x) | 3 | 4 | 0 | 2 | 1 g(x) | 2 | 1 | 3 | 4 | 0 Find each: a) f(f(4)) b) f(g(1)) c) for what "x" is "g(f(x))=4"? Click here to see answer by only4christ2(12)

 Question 741240: Find the difference between the sum of the first positive 100 multiples of 3 and the sum of the first 100 positive even integers. Click here to see answer by mananth(13127)

 Question 741295: given the function x squared -6x=5 answer the following A) Is the point (-3,32) on the graph f? b)List the Y intercepts c)List the X intercepts? d)What is the domain of f(x)? Click here to see answer by MathLover1(7480)

 Question 741342: Verify that the function y-x^2+2 has a y-axis symmetry. This is the question. Are you testing for symmetry by replacing x with -x or are you simply finding the axis of symmetry by using the formula -b/2a and letting the equation equal zero. Click here to see answer by stanbon(60778)

 Question 741343: 2x2 + y2 = 1 y = 7x4 x = 3y2 y = 2x + 1 Which of these are functions? Click here to see answer by stanbon(60778)