# math: pre-calculus

161,721 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 think I know how the ...
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 that a student selected...
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 : (14/5,20) But in ...
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 for the help =)
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 for the help =)
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 answer options are a. x...
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 question is ... Which ...
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 we know it explodes ...
16. ### math: pre calculus

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

Write the expression as a single logarithm. Ln(e^3y)+ln(ey)-4
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 everyone did it and ...
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 paint and uploaded ...
23. ### 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
24. ### math: pre-calculus

Evaluate the expression without using a calculator. Unless stated otherwise, all letters represent positive numbers. e^(ln√x+5)
25. ### 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...
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 not, that's ok. I'll ...
29. ### pre calculus

x^2-3/4x+1/8=0
30. ### pre-calculus

3(4^x)-2^(x+2) = -1

C=2 x^=8y

2k^2+5k-9

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

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

3x^2 + 8 = -4
36. ### pre calculus

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

x^3e^x - 4e^x =0
38. ### Pre-calculus

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

what is the F-^1 of 6/x+4
40. ### PRE CALCULUS HELP PLEASE

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

x^2-3x-7=0

(m+3)+5
43. ### pre calculus

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

(2^(4+pi))/ 2^(1+pi)
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

let f(x)= -x^2 - 1. evaluate f(x)at x=6, -6
48. ### pre calculus

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

what is the vertices of (x+1)^2/4+(y+2)^2/25=1 ?
50. ### Pre-Calculus

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

Given: u <-1, 7> and v <4, -3> Find: (u • v)(u + v)
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 ?

14cos+7=O
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 12

how to graph y= (x^2-3x-10)/(x-2)
56. ### Pre-Calculus

How do I find xy^-2(xy^2 - 4y^4) ??
57. ### pre calculus

find (a)2v+u, (b)u-3v), and (c)5u-v u=<-2,-3> v=<-1,-10>
58. ### pre calculus

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

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

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

if y = bX, then its inverse is
62. ### Pre Calculus 1

lnx + ln(x+3) = 2
63. ### Pre Calculus 1

ln(3x-1) - ln(x+2) = 2ln5
64. ### pre calculus

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

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

What is the domain of (x+2)/(x-2)?
67. ### Pre-Calculus 12

how to solve 3^(x-2) = 5^x
68. ### Pre Calculus

Formula: a = b = c

gfk
70. ### Pre Calculus

Formula: a = b = c
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 wrong and explain what i ...
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

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

Need help with the following along with all steps. Find y" for y = 3x + 4/x
75. ### Pre-Calculus/Trigonometry

For f(x)= 1/(x-5) and g(x)= x^2+2, find: a. (f o g)(x) b. (g o f)(6)
76. ### Pre-Calculus

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

tan(1/2)cos^-1(9/10)
78. ### Pre-Calculus 12

Solve using logarithm: 2^(4x+1)=3^x
79. ### college pre-calculus

if 1-1/x=2-2/x, then 3-3/x=? A. -3 B. -1/3 C. 0 D. 1/3 E. 3 idek how to do it?
80. ### pre-calculus

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

Can someone help me with this equation: y = (2*10^(-44))*(e^(0.055x))?
82. ### Pre-Calculus/Trigonometry

for f(x)= 1/(x^2-3), find: a. f(3) b.f(2+h)
83. ### Pre-Calculus

find the inverse of g(x)=(x+7)^3+4
84. ### Pre-Calculus

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

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

How do I find f(g(x)) when there is a radical?
87. ### Pre-calculus

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

how do you tell if a function is even or odd?
89. ### Pre Calculus

FACTOR COMPLETELY 1) x^8-y^8
90. ### pre calculus

Can you explain how to find (u • v)(u + v) when u <-1, 7> and v <4, -3>

92. ### Pre-Calculus

y= ((2-3x^(1/x))/(2+3x^(1/x)) Is the horizontal asymptote y= 1 or y= -1?
93. ### pre-calculus

use gauss-jordan x+2y=5 2x+y=-2
94. ### pre calculus

are you an online tutor
95. ### Pre-Calculus

How do I find the domain of K(x) = x(32 - 2x)^2?
96. ### 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?
97. ### Pre calculus- help!

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

What are the holes of the function f(x) = (x^2 + 3x - 4)/(x^2 + 9x + 20)?
99. ### Pre-Calculus

Reflect f(x)=x^2 about the y-axis. What changes?
100. ### Pre-Calculus 12

2x^3 - 13x^2 + 32x - 13 = 0