# 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

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

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.

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

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

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.