Pre- Calculus

21,911 results, page 5
  1. pre calculus

    evaluate if possible the function at the given values(s) of the independent variable. Simplify the results. f(x)=7x-4 a) f(0) b) f(-3) c) f(b) d) f(x-1)
  2. Pre-calculus/Trignometry

    Which of the following is a correct equation for the line passing through the point (-1,4) and having slope m = -3? A. y-4=-3(x+1) B. y=-3x+1 C. 3x+y=1 D. y=-1/4x-3
  3. Pre-calculus

    Evaluate sin 7pi/12. Using sum, difference, and cofunction identities
  4. Pre Calculus

    Establish the following identity sin 2x/sinx - cos2x/cosx = secx
  5. Pre-Calculus

    How to write this conic section in standard form? 3y^2 = 108 - 12x^2
  6. pre calculus

    how do i solve this problem: Draw the angle in quadrant I whose terminal side is on y+4x
  7. Pre Calculus

    Find the exact value ofcos (u+v) given that sin u= 7/25 and cos v=−12/13. (Both u and v are in Quadrant II.)
  8. Pre-Calculus/Trigonometry

    Sketch an angle in standard position 7Pie Divided by 12
  9. Pre-calculus

    Find the correct end behavior for a given polynomial function. 3.36x^4+8x^2+x-9
  10. Pre-Calculus

    Determine the open intervals on which the function is increasing, decreasing, or constant. f(x) = 3 f(x) = x^(2/3) f(x) = -x^(3/4)
  11. PRE - CALCULUS

    A statement Sn about the positive integers is given. Write statements Sk and Sk+1, simplifying Sk+1 completely. Sn: 1 + 4 + 7 + . . . + (3n - 2) = n(3n - 1)/2
  12. Pre Calculus Repost Please Help

    Can someone help me solve this problem: cos^2x + 5cosx - 2= 0 I am having some trouble finding x
  13. Pre-Calculus

    Help please Find the equation, in standard form, of the line passing through the points (2,-3) and (4,2). 5x-2y=16 y=5/2x+8 5x+2y=16 2x-3y=9
  14. pre-calculus

    find the cube roots of -216 answer in polar form
  15. pre calculus

    Algebraically solve the system of equations using any method you wish 3x-10y+z=5 -4x+9y-z=-6 -13y+z=2
  16. Pre-Calculus

    How to write this conic section in standard form? 3y^2 = 108 - 12x^2
  17. pre-calculus

    eliminate parameters of x=1+cos t y=1-sin t graph the parametric equations
  18. Pre-Calculus

    f(x)= 3+5cos pi/3 (x-7) If f(x)=4, solve for x. Find 1st 3 positive values. my answers: 2.31, 5.69, 8.31
  19. Pre-Calculus

    36x-15y+50z=-10 2x+25y=40 54x-5y+30z=-160
  20. pre-calculus

    cosx= -8/17, 180<x<270 find; sin(x/2) cos(x/2) tan(x/2)
  21. Pre Calculus

    Radium-221 has a half-life of 30 s. How long will it take for 95% of a sample to decay
  22. pre calculus

    Use properties of logarithms to find the exact value of the expression log_7 (343 * 7^15)
  23. Pre-calculus: Logarithms

    ln56/ln7=ln8. Is this true or is this false? How can I find this out?
  24. pre calculus

    Use the half-angle formula to simplify the given expression. squareroot 1+cos12x/2
  25. Pre calculus

    use a calculator to find approximate solutions of the equation. 7.63x^2+2.79x=5.32
  26. Pre calculus

    Please help me! Find the exact solutions to the quadratic equation in the complex numbers. (x-13)²=-36
  27. pre calculus

    9x^2+25y^2-36x+250y+436=0 what is the center and the vertices of this ellipse?
  28. pre calculus

    graph the function below. Determine the domain, range and horizontal asymptote. f(x) = -(3/4)^x - 1
  29. Pre-calculus

    Given f(x)=6x^4-7x^3-23x^2+14x+3, approximate each real zero as a decimal to the nearest tenth.
  30. pre-calculus

    suppose g(t)=kf(t). Find the average rate of change of g over the interval [a,b] in terms of f
  31. pre-calculus

    tangents are drawn from the point (-4,0) to the circle x^2 +y^2 =1. find the slopes of the tangent.
  32. Calculus

    An important problem in mathematics is that of root finding: that is, given a function f (x), finding any roots of f in an interval. Exact methods exist for many functions: • In the case of a linear function f (x) = ax + b, this is easy. – If a ≠
  33. Pre-calculus

    Use the remainder theorem to find which of the following is not a factor of x3 + 12x2 + 47x + 60 the answer is x-5 but idk why
  34. college pre-calculus

    what is the equation of lowest degree with real coefficients if two of its roots are -1 and 1+i? A. x^3+x^2+2=0 B. x^-x^2-2=0 C. x^3-x+2=0 D. x^3-x^2+2=0 e. none of the above i don't get it is it (x+1) (1+i)
  35. Pre-calculus

    find the trig functions of angle x if the terminal side of x passes through the point (-12, 5).
  36. Pre-Calculus

    Find the inverse of the following quadratic equation. Hint: Complete the square first. y= x²+14x+50
  37. pre-calculus

    in Triangle abc, tanA=3/4, tan B=1, and a=10. find b in simplest radical form.
  38. pre-calculus

    find the area of the segment formed by a chord 24 cm long in a circle of radius 13 cm.
  39. Pre Calculus 12

    I also do not get these inverses questions y = 5(x-3)^3 x = 5(y-33)^3 I divided 5 on both sides and got 1/5x = (y-3)^3 Then do I cube root the 1/5x or something to get rid of of the cubed on (y-3)? Also y = x-2/5x-3
  40. Pre Calculus

    Use a calculator to evaluate csc 3ð/14 A. 1.604 B. 1.279 C. 47.686 D. 42.314 E. .739
  41. Pre-calculus

    Determine the values of the trigonometric functions of t if P(t) lies in the second quadrant and on the line y = −2x.
  42. Pre-calculus-chck answers

    Determine the value of w so that the line whose equation is 5x-2y=-w passes through the point at (-1,3). Answer: w=11
  43. pre calculus

    Write the complex number 100(cos240°+ i sin240°) in standard form.
  44. pre calculus

    Use Gaussian elimination to write the system of equations given below in row-echelon form 2x+4y+z=-4 2x-4y+6z=13 4x-2y+z=6
  45. Pre-calculus

    I want to make sure this is right. the inverse of f(x)=(-3x+2)/(2x-1) I got f^-1(x)=(x-2)/(2x-3). if its right how do i check the answer to see if it is right. also would the domain of f be D=all real numbers except 1/2. And I do not know how to get the
  46. pre-calculus

    please help me with thisone thanks solve the inequality algebraically. Express the solution in interval notation. (x-8)^2/x^2-36 > 0
  47. Pre-Calculus

    Find all the real zeros of the polynomial. Use the quadratic formula if necessary. 4x^3 − 10x^2 + 9
  48. pre-calculus

    find the cube roots of -216 answer in polar form and complex
  49. pre-calculus 11

    The infinite series 1+3x +9x^2 +27x^3+.. has a sum of 4.The value of x is? so if 1/1-r I substitute 1/1-3x =4 so x=1/4 if someone could confirm that my answer is correct? thanks so much
  50. Pre-Calculus/Trigonometry

    Solve the following system of equations algebraically. Verify your solution by using matrices. 3x-y=0 5x+2y=22
  51. Pre calculus

    Use the given conditions to write an equation for the line in point-slope form. Passing through (-5, -7) and (-8, -6)
  52. pre-calculus

    partial fraction; use the rational roots theorem to factor denominator. x^3 + 2 ----------- x^4 +8x^2 +16 i got to that and im stuck Ax+B + Cx+D ---- ----- x^2 +4 x^2 + 4
  53. Pre-Calculus

    Write a linear equation to fit the description. The line with a slope of zero containing the y-intercept of x/3 + y/9 = 1 I'm not sure what to do here. Can someone please help me?
  54. Pre Calculus

    Given Triange ABC with an area of 100.2 a = 32.5 c = 29.2 Find angle B, expressed in degrees.
  55. Pre-Calculus 11

    In Triangle DEF, DE = 11cm and EF = 9 cm. For which measure of angle D is it possible to draw two scalene triangles.
  56. pre-calculus

    Use the rational root theorem with polynomial division if needed to find all the zeroes of:     P(x)=2x^4-3x^3+3x^2+5x-3.
  57. Pre Calculus

    use a calculator to find approximate solutions of the equation. 8.06x^2+25.8726x-25.047256=0
  58. Pre-Calculus

    Help please, am i correct? The border line of the linear inequality 4x-2y < 1 is solid. True False <--
  59. pre calculus

    solve the following equation in the complex number system Please show all your work. 5x^5 + 32x^4 - 5x - 32 = 0
  60. Pre-calculus

    Plss... help me.. what is the equation of parabola with vertex on the line y=x, axis parallel to Ox, and passing through (6,-2) and (3,4)? thanks!
  61. Pre-Calculus

    Does this: sqrt 3x-4=(x-4)^2-3 Multiply out to: x^4-16x^3+90x^2-111x+173 Once I know it is multiplied out right then I can continue. Thanks
  62. Pre-calculus

    I have a really basic question. Say I have a rational expression and my numerator is 4xy. Am I allowed to factor out just the x or just the y? For example y(4x)?
  63. Pre-Calculus

    Solve the equation 4sin x = e^x on the interval (0, 1). Correctly rounded to two decimal places, x=
  64. Pre-Calculus

    Find all solutions of the equation and express them in the form a + bi. 36x^2 − 12x + 2 = 0
  65. pre calculus

    The conic section whose equation is x^2 - 3y^2 - 8x + 12y + 16 = 0, is in Position is I. Is this statement true or false
  66. Pre Calculus

    Can someone help me with this problem...I have no Idea how to do it. Find the area between each curve and the x-axis for the given interval. y=16x-x^3 from x=0 to x=4 Thanks for the help>>
  67. Pre-Calculus

    Use an Addition or Subtraction Formula to find the exact value of the expression: tan7π/12
  68. Pre-calculus

    The problem is Find the difference quotient and simplify your answer F(x)=5x - x^2, F(5+h) - F(5) over h ^2 this means power of two
  69. Pre-Calculus

    True or false: Suppose that y varies directly as x. If y is 5 when x is 30, the constant of variation is 150.
  70. pre-calculus

    the function has a real zero in the given interval. approximate this solution correct to two decimal places: f(x)=x^4-x^3-7x^2+5x+10; (2,3)
  71. pre-calculus

    2y^-3 = 4e^(-x/2)/(1+e(-x/2)) my teacher gave this problem in my chem class and i don't know what he is really asking , does any one have an idea if i have to solve for y or what's going on.. how would this be done..
  72. Pre-Calculus

    Identify the following features of the graph of g(x) = (3/2)^x+2 A) Asymptotes B) Intercepts C) Increasing or decreasing I really do not know how to find these
  73. pre calculus

    Solve the following inequality and write using interval notation x^2 - 22/ x -4 >_ -7/2 this sign > has the slash underneath Help me!
  74. pre calculus

    Use Gaussian elimination to write the system of equations given below in row-echelon form. 2x+4y+z=-4 2x-4y+6z=13 4x-2y+z=6
  75. pre Calculus

    how do you find additional points on a line with a slope of 1/2 and a given point of (7,-2)? im sorry but i still cant get an answer for this question.
  76. Pre-Calculus

    Write an equation in slope-intercept form of the line with the given parametric equations. x=t+6 y=2t-4
  77. pre calculus please help

    Find all solutions of the equation tan^5 x - 9tan x =0. The answer is Ak\pi where k is any integer, the constant A=???
  78. Pre-Calculus

    Simplifying Complex Fractions [(x+3)/12] / [(4x-5)/15] [(x+3)/12] x [15/(4x-5)] (x+3)5/4(3x-5) (5x+15/12x-20)<-- final answer Did I do this right. If not could you please explain how to do it correctly
  79. pre - CALCULUS

    Find the indicated sum. Show your work. 4 k=1 (-1)^k(k+11) Inbetween the 4 and k , Theres a backwards 3 sign
  80. pre-calculus

    solve for the follow inequality. write your solution in interval notation. x^3-49x¡Ü0
  81. Pre-Calculus

    Locate the foci of the ellipse. Show your work. x^2/36+y^2/11=1 c^2=a^2-b^2 c^2=36-11 c^2=25 c= ± sqrt25 c= ±sqrt5*5 is this correct?
  82. pre- calculus

    In how many ways can a family of six be seated at a round table if the mother and father must sit together?
  83. pre-calculus

    create a p(x) with the following conditions: A) Vertical asymptotes at x=5 and x=-2 B) A double root x=-3 C) A horizontal asymptote at y=3
  84. pre - CALCULUS

    Solve the system of equations using matrices. Use Gaussian elimination with back- substitution. x+y+z = -5 x-y+3z = -1 4x+y+z = -2
  85. Pre-Calculus

    How do I find the minimum or maximum of this y = 2x³ + 3x² - 12x? It makes 2 curves.
  86. Pre-calculus

    Find the minimum value of f(x, y) = y – x + 1 for the polygonal convex set determined by this system of inequalities. x > 0 y > 0 2x + y< 4 the answer is -1. please tell me why
  87. Pre-Calculus IB

    If R is the remainder when each of the numbers 1059, 1417, and 2312 is divided by D, where D is an integer greater than 1, compute the value of D - R.
  88. Pre-Calculus

    Find a polynomial with integer coefficients that satisfies the given conditions. P has degree 2 and zeros 2 + i and 2 − i.
  89. Pre-Calculus

    I need to write a polynomial of the smallest degree with roots 5 and 6 and the answer can't have parentheses. Can someone point me in the right direction. I have several of these to do.
  90. pre calculus II

    describe the domain, range,asymptotes and if the graph increase or decrease, and is this is a funtion from this equation y=5-3^x
  91. Pre calculus

    olve the system of equations using matrices. Use Gaussian elimination with back-substitution. x + y + z     =      -5 x - y + 3z    =     -1 4x + y + z    =     -2 I need it explained to me, how do I do this?
  92. Pre-Calculus/Trigonometry

    Solve the following system of equations algebraically. Verify the solution by using matrices. 8x-2y=5 -12x+3y=7
  93. Pre-Calculus-check answers

    Write the equation of the circle that passes through the point (3,4) and has its center at (1,2). Answer: (x-1)^2 +(y-2)^2 = 8 Thanks for the help.
  94. pre-calculus

    How do i know if a conic section is a circle, ellipse, hyperbola, or parabola? based on it's equation such as 4x^2 - y^2 + 24x + 4y + 28 = 0
  95. Pre calculus

    1. convert polar equation to rectangular coordinates: r^2=4sin2theta 2. find the coefficient of x^5 in the expansion (x+2)(x+1)^8
  96. Pre-Calculus

    What makes a mathematical induction true? I know how to solve both steps in the proof, but how do you reach this conclusion?
  97. pre-calculus

    Find the real and imaginary zeros for the following polynomial function. T(b)= 147b^3-35b^2-19b+3
  98. Pre calculus

    1. Write in terms of cos and sin function. cotx*secx Show work.
  99. pre - CALCULUS

    Use Gaussian elimination to find the complete solution to the system of equations, or state that none exists. x + y + z = 9 2x - 3y + 4z = 7 x - 4y + 3z = -2 A. {(-7z/5+34/5 ,2z/5 +11/5 , z)} b. {(- 7z/5+34/5 , 2z/5- 11/5 , z)} c . {( z/5+ 34/5 , 2z/5+11/5
  100. pre calculus

    A velocity of 30 mph is resolved into two components, each of which makes an angle of 45 degrees with it. Find their magnitude.