# math: pre-calculus

162,738 results
1. ## Pre-Calculus/Calculus

I am too embarassed to ask this Calculus (really pre-calculus) question in tutoring, because I know I should know. Is the inverse of f(x)=3x-1 actually f(x)=1/3x+1? How do I find it? What if it asks the same equation replaced with f to the -1 power (x)? I
2. ## Finite Math

Fifty percent of students enrolled in calculus class have previously taken pre-calculus. Thirty percent of these students received an A for the calculus class, whereas twenty percent of the other students received an A for calculus. Find the probability
3. ## Pre-Calculus

I am in Honors Pre-Calculus and am having a hard time understanding my teacher. I feel so stupid. Does anyone have any suggestions on a website that might give me some insight into what I am doing wrong? Thanks!
4. ## Pre Calculus

Pre Calculus why is sin(-20)/cos 380 equal to tan (-200)
5. ## Pre Calculus 12

Im going over my pre calculus 12 exam, and I need help with one question from the chapter Transformations of graphs and stuff. Combining Transformations 2y = f(5x-10)+8 The original points are (4,6) and the new points I got by translating it and stuff are
6. ## Pre-Calculus

I'm trying to finish up my pre-cal homework and I am stuck on 2 problems... ***determine the intervals over which the function is increasing, decreasing, or constant*** 32. f(x)=x^2-4x 33. f(x)=√x^2-1 (that's square root of x^2-1) thank you so much
7. ## Pre-Calculus

I'm trying to finish up my pre-cal homework and I am stuck on 2 problems... ***determine the intervals over which the function is increasing, decreasing, or constant*** 32. f(x)=x^2-4x 33. f(x)=√x^2-1 (that's square root of x^2-1) thank you so much
8. ## Math (pre calculus)

ax+b/cx+d=2 solve for x
9. ## pre calc

A math teacher uses four algebra books, two geometry books, and three pre-calculus books for reference. In how many ways can the teacher arrange the books on the shelf if books coiver the same subject matter are kept together?
10. ## pre-ap pre calculus

To solve an equation by finding x-intercepts, Cynthia graphed the function y=x^3-5x+|2x-3| Give several possibilities for the original equation. How do I do it and what's the answer? Thanks
11. ## Pre-Calculus

Can you show me how to find the rectangular equation: r=2cos(theta) + 3 sin (theta) All I need is an example to work off I was absent today from Pre-Calc and I have homework to do and no explanation with them-Please help with this one Thank you
12. ## Math (pre calculus)

please simplify (1/1+x+h) - (1 /1+x ) divided by h
13. ## Math - Studying for Pre Calc exam!

Approximate the solutions (to three decimal places) of the given equation in the interval (- pi/2, pi/2) 6 sin 2x − 8 cos x + 9 sin x = 6 Can you help with this please? I am studying for my Pre Calculus 1 exam and am stuck on this question...! The
14. ## Math, calculus, advanced functions, pre calculus

An investments value, V(t) is modelled by the function V(t)=2500(1.15)^2, where t is the number of years after funds are invested A) find the instantaneous rate of change in the value of the investment at t=4, what intervals would you choose? Why? My
15. ## Pre-Calculus 12

I am refering to the question posted on Tuesday, June 6, 2017 at 8:26pm. "how to graph y= (x^2-3x-10)/(x-2)" This is the reply I got: Pre-Calculus 12 - Damon, Tuesday, June 6, 2017 at 9:21pm (x-5)(x+2)/(x-2) well we know it is 0 at x = 5 and at x = -2 and
16. ## math: pre calculus

How do I find the exact value of sec(2.4)?
17. ## math: pre-calculus

Write the expression as a single logarithm. Ln(e^3y)+ln(ey)-4
18. ## Pre-Calculus

can someone help me with figuring out my math and explaining it to me. or How to use the calculator with the problems ?
19. ## Math (pre calculus)

Solve 2^3-x = 5^2x+1 Give an exact solution.
20. ## Math (Pre-Calculus)

Can someone help me with this? Thanks! Find the zeros of the function algebraically. f(x)=x^2-8x+15 ---------------- 10x
21. ## Question

@Alex asked this question when I was on earlier: Let line l_1 be the graph of 5x + 8y = -9. Line l_2 is perpendicular to line l_1 and passes through the point (10,10). If line l_2 is the graph of the equation y=mx +b, then find m+b. I'm wondering like how
22. ## Pre-Calculus - Reiny

Reiny you helped me with this logarithm yesterday: How did you write it out as log2 ( √A / B^3 ) Laws of logarithms combine, write as a single logarithm Need help on this question please, Im stuck, don't know where to go abouts from here: I did it on
23. ## math: pre-calculus

Evaluate the expression without using a calculator. Unless stated otherwise, all letters represent positive numbers. e^(ln√x+5)
24. ## Math(pre-Calculus)

Find the standard form of the equation of the circle. 3(x+2)^2 + 3(y-1)^2=18 so i used this formula r^2 = (x+h^)2 + 3(y+k)^2 i just plug in the number but what do i do with the 3's outside of the parenthesis or i have to do something else...
25. ## HELP WITH MATH

Sorry the caps lock was on. Can you help me with this pre calculus question. I'm not quite sure how to do this. Here are the instructions. Find the area between each curve and the x-axis for the given interval: y=2x^2+x+1 from x=3 to x=6
26. ## Math

Is IB Math Studies the same as Pre-Calculus? I heard that IB Math Studies is for students who have a low background in math. Is that right?
27. ## Foundations and Pre-Calculus Math 10

Find the radius of a cone with a height of 3m and a volume of 30m cubed. So far I have 90m cubed / 3m = pi(r^)3m/3m. Then I get stuck. Help! I'm really bad at math. ):
28. ## Math (pre-calculus)

Hi! I have a question! I forgot how to do these two problems, and I need some help in solving them! Thanks so much! 1.) Find the first 5 terms of the sequence given by a1=2, an=3an-1 -1. (It's: a sub 1 =2, a sub n= 3a sub n-1 -1) Does that make sense? If
29. ## pre calculus

-2< x < 5 - -
30. ## pre-calculus

x^3e^x - 4e^x =0
31. ## PRE CALCULUS HELP PLEASE

((ln(x))^1/2)/(ln(x^1/2))=6

C=2 x^=8y
33. ## pre-calculus

(2^(4+pi))/ 2^(1+pi)
34. ## pre-calculus

3(4^x)-2^(x+2) = -1
35. ## pre-calculus

what is the F-^1 of 6/x+4
36. ## Pre-calculus

2^(x)/(1-2^(x))=3
37. ## pre calculus

x^2-3/4x+1/8=0

x^2-3x-7=0

2k^2+5k-9=0
40. ## pre calculus

2n^1/3(n^2/3+n^-1/3)
41. ## pre calculus

27^8x-3=(1/81)^8x-4 x=?
42. ## Pre-Calculus

3x^2 + 8 = -4

(m+3)+5

2k^2+5k-9
45. ## Pre-Calculus

Hi! I'm having trouble with this math question; can someone help? Thanks! :) Given the function f(x)=x^2+9, solve. a.) Find f(-3) b.) Find f(x-2)
46. ## math: pre-calculus

Solve the equations. Log(6x-1) = Log(x+1) + log4
47. ## pre calculus

2x^2+11x-21=0
48. ## pre- calculus

simplify 3x+2y/3y
49. ## Pre-Calculus

Given: u <-1, 7> and v <4, -3> Find: (u • v)(u + v)
50. ## pre calculus

if y = bX, then its inverse is
51. ## Pre-Calculus

What is the absolute value of: 3 - 8i? A. 9 B. 64 C. √55 D. √73
52. ## pre - CALCULUS

Let B = [-1 3 6 -3]. Find -4B. A. [-4 12 24 -12] B. [-3 1 4 -5] C. [4 -12 -24 12] D. [4 3 6 -3] b ?
53. ## Pre-Calculus 12

how to solve 3^(x-2) = 5^x
54. ## pre calculus

find (a)2v+u, (b)u-3v), and (c)5u-v. 1.u=i-j, v=6i+9j 2.u=2i+3j, v=-i-2j
55. ## Pre Calculus 1

ln(3x-1) - ln(x+2) = 2ln5
56. ## Pre-Calculus

How do I find xy^-2(xy^2 - 4y^4) ??
57. ## Pre Calculus 1

lnx + ln(x+3) = 2
58. ## Pre-Calculus 12

how to graph y= (x^2-3x-10)/(x-2)

gfk
60. ## pre calculus

what is the vertices of 7x^2+5y^2=35
61. ## pre calculus

find (a)2v+u, (b)u-3v), and (c)5u-v u=<-2,-3> v=<-1,-10>
62. ## Pre-Calculus

How do you factor x^3 - 64?
63. ## Pre Calculus

Formula: a = b = c
64. ## Pre Calculus

Formula: a = b = c
65. ## pre calculus

solve 2x + y = 8 4x + 2y = 16
66. ## pre-calculus

What is the domain of (x+2)/(x-2)?
67. ## pre calculus

what is the vertices of (x+1)^2/4+(y+2)^2/25=1 ?
68. ## pre calculus

find (a)2v+u, (b)u-3v, and (c)5u-v u=<0,-4>, v=<-2,-8>
69. ## pre calculus

let f(x)= -x^2 - 1. evaluate f(x)at x=6, -6

14cos+7=O
71. ## math(Pre-Calculus)

Evaluate the difference quotient F(x)= (x+h)-f(x) ----------- H A.) f(x)= 3x -1 so far i have done this f(x+h) = 3(x+h)-1 b.) f(x)=2X^2 + 3X i have done this f(x+h)= 2(x+h)+3(x+h) im not sure if my answers are right.. just need some advice if they are
72. ## Math

Hello I am having trouble with a pre-calculus problem. The problem is ln|Sin2X-CosX-1|=0 if you could help by listing the steps to solve that would be great! Thanks!
73. ## Pre-Calculus

For any two linear functions f(x)=ax+b and g(x)=cx+d, is f o g the same as g o f?
74. ## Pre-Calculus

find the inverse of g(x)=(x+7)^3+4
75. ## pre calculus

x^2+y ^2+ 4x + 6y - 12 = 0 how do i find the domain?
76. ## Pre-Calculus

C (3,4) tangent to the line y=1/3x-1/3
77. ## Pre calculus- help!

find (gof)(x) when f(x) = √x+1 and g(x) = x^2+3/x
78. ## Pre-Calculus

How do I find f(g(x)) when there is a radical?
79. ## Pre-Calculus 12

Solve using logarithm: 2^(4x+1)=3^x
80. ## Pre-Calculus

How to find domain of: y = -3 + ãx+6
81. ## pre-calculus

Let f(x)=x^2+bx+27. Find the value(s) of b so that f(x) has minimum value of 2.
82. ## Pre-Calculus

What are the holes of the function f(x) = (x^2 + 3x - 4)/(x^2 + 9x + 20)?
83. ## pre-calculus

use gauss-jordan x+2y=5 2x+y=-2
84. ## Pre-Calculus

Find the value of the parameter: x = 3t y = t^2 + 5 t = 2
85. ## Pre-Calculus

is f(x)=9x^(5/3) a power function?
86. ## Pre-Calculus

How do I find the domain of K(x) = x(32 - 2x)^2?
87. ## Pre-calculus

1) What is the equivalent of this? -5x(2x+7y)+7xy-4x(y+3)
88. ## Pre-Calculus

y= ((2-3x^(1/x))/(2+3x^(1/x)) Is the horizontal asymptote y= 1 or y= -1?

90. ## pre calculus

Name 3 different representations of the following (-6, 3pi/4)
91. ## pre-calculus

tan(1/2)cos^-1(9/10)
92. ## pre calculus

are you an online tutor
93. ## Pre-calculus

x-2/x2-1 This equation is a function or not?
94. ## Pre-Calculus

Is the period of f(x) = 2cos(3x - ð) 2ð/3?
95. ## pre calculus

simplify sin(2 pi/3+x)
96. ## Pre-Calculus

given: ((x-2)^2/9)+((y-4^2/16)=1 what is the major axis?