Number of results: 26,147
Solve each inequality: (1/(2b+1)) + (1/(b+1)) > (8/15) (2/(x+1)) < 1 - (1/(x-1)) My teacher told me the answer is in interval notation, and that a number line is used to solve.
January 10, 2015 by John
Find the derivatives of 1. ln[(2x^3⋅2e^x)] 2. xy = cot(xy) 3. y = cos(x^3 + 27) I don't really know where to start with these. The answer is (3+x)/(x) for the first, y/-x for the second, and 35. -3x^2 sin(x^3 + 27) but I have no idea how they got there. Thank you!
May 7, 2015 by Heather
Solve the indicated variable: 1. Volume of a cone: solve for h: V=¨ir^2h/3 2. Temperature formula: solve for C: F=9/5C+32 pleaseeeee help me solve these! plzzz! i have nooo idea how to do these. THANKS! =)))
September 20, 2009 by kitty kat
I have a couple questions, I need to know how to solve these type of problems. X^2 -4< X + 16 5/n+2 - 5/n = 2/3n 2X^3-x^2-6X + 1/ X^2 + 5x - 8 1) rearragne the terms to get x^2-x-20<0 (x-5)(x+4)<0 which means that one term can be negative, or -4<x<5 check that. ...
June 14, 2007 by <3 A
Check my precalc
what is the f inverse of f(x)= ln(x-3) I got y= e^x - 4 Solve 8 times 10^(2x-7)=3 I do not know how to do this. Do i get 8 and 10 with the same base? How? Thanks!
November 18, 2012 by Rebekah
Someone please help me solve this equation for y. (x^2)(y^2)+xy=1 I need to solve for y so that i can graph it! y^2 + y/x - 1/x^2 = 0 Treat 1/x as b and -1/x^2 as c in the quadratic equation ax^2 + bx + c = 0 There are two solutions y = [-1/x + sqrt(1/x^2 + 4/x^2)]/2 and y...
February 26, 2007 by Jill
Given g(x) = print_coeff(m,1)x print_const(b), find g(print_coeff(n,1)a) I was told that the answer for this is a. However, I have no idea how to solve it. Please help me understand. I have no idea how to interpret what you have written. It is not standard algebraic notation. ...
August 10, 2007 by Doralis
I have no idea how to solve this one problem: Round to two decimal places. Two observers 25 feet apart, sight to the top of the tree. If the angle of elevation to the top of the tree from the observer closest to the tree is 30 degrees and the angle of elevation from the ...
December 1, 2014 by Heather
Solve 3x +1 < 5 or 3x +1 > 4 By saying "solve," is it asking for me to show it on a line and in interval notation? Here's another: f(x) < 3 and f(x) > 4, where f(x) = 1/2x - 7 I have no idea how to solve this! Please walk me through it! Thank you so much!
January 26, 2009 by Harper
1. Solve log (4x) = log (2) + log (x-1) the fact that this is x-1 and not + is really messing me up because i keep getting a negative number and that isnt possible 2. Solve: absolut value of(x^2 -4x-4) = 8 thanks so much!!! I have been studying and my final is tomorrow. these ...
December 20, 2012 by Rebekah
1. Find the exact value 3sin(invertangent (-1)) I got 0. Given 0<x<orequalto 1, determine the value of inversine (x) + inversetan (squareroot(1-x^2)/x) I really have no idea how to do that. I am trying to draw a diagram but cant figure it out. Thanks!
February 11, 2013 by Rebekah
Precalc stuff.. square root of z-1= square root of z +6 are you solving for z? square both sides then solve for z. that's my problem, i'm not sure how to solve for z. i need a process. it's not in my book or anything.
March 7, 2007 by Blondie
How to solve for x: 2^(2x) + 2^(x) -12 = 0 Steps too I tried solving this but I ended with ln(12) / 2ln(2) + ln(2) but the real answer is supposed to be ln(3) / ln(2) or 1.585
January 27, 2011 by Amy
Solve for "x" and "y" given the following matrix equation: (2x, 0.5y, -2, 1) * (3, -2, 0, 1) = (-24, 19, -6, 5) (the matrices are going from left to right, they're all 2x2's.)
May 25, 2014 by Aly
Find the greatest possible value of 5cos(x)+6sin(x). I know that it would be a good idea to look for identities that are in the form of acos(x)+bsin(x), but I can't seem to find any. Other than that I don't really know where to go with this problem. Any help would be much ...
December 16, 2014 by majorbill
Hello, good afternoon. I need help with my precalc hw. we are learning about finding zeros I dont which method I should use for this problem: if i is a zero of x^3+3x^2+ix+(4+i) what do i do? synthetic divison? or long division? when i did long division i got a werid ...
October 14, 2008 by Samya
solve the following pair of simultaneous equation: (x/a)+(y/b)=1 (x/b)+(y/a)=1 can someone help please?i have no idea how to solve it =( x/(ab) + y/b^2 = 1/b x/(ab) + y/a^2 = 1/a Subtract one from the other y(1/b^2 - 1/a^2) = 1/b - 1/a y(1/b + 1/a)(1/b - 1/a) = (1/b - 1/a) ...
July 11, 2007 by Emma
Solve for x log[1/3](x^(2) + x) - log[1/3] (x^(2) - x) = -1 Steps too please. so far I tried this and I got 3 = (x+1) / (x-1) I asked this question before, but what would x= ?
January 27, 2011 by Amy
To solve the system of equations, which expression could be substituted for x into the first equation? 3x-5y=14 x+4y=10 a)10-4y b)4y+10 c)(1/4)x+(5/2) d)(-1/4)x+(5/2) I have another problem just like this one so if you could explain how to solve this one I can (hopefully) ...
July 27, 2007 by maddie
solve for x in the interval zero to two pi. 2 sin 4x = 1 i got 5 pi/24 and pi/ 24 but my teacher said that there should be eight solutions. what would those be and how would i find it"
October 3, 2012 by greeny
Use the following conditions to create a sketch of the function by hand. a. f(x) is increasing from (-infinity,-4)union(-4, infinity) b. there is a vertical asymptote at x=-4 c. There is a horizontal asymptote at y=2 d. f(0)=-5; f(1)=-3; f(3)=1 I have an idea of what this ...
September 30, 2009 by MUFFY
How do I answer this f(x) = x - 3 (x + 4)^(1/2) and am asked how to solve for x when y = -5 I have no idea how to do this and know that I could just solve it by guess and checking but I want to know how to do this algebraically when plugging in the -5 and trying to solve for x...
May 26, 2009 by Dylan
I have no idea how to solve this problem. The question says: Determine whether the points A(4,5), B(-3,3), C(-6,-13) and D(6,-2) are the vertices of a kite. Explain your answer. Can you please help me with the steps to solve it and understanding it.
February 18, 2008 by Avalon
Teach me how to express 5sqrt3 - 5i in polar form please. I don't want you to do the work for me. Just show me the steps I need to do the work properly on my own. Otherwise I will not pass this class or the exam when I enter college, and I do not want to retake PreCalc. Its a ...
April 13, 2012 by tabby
How to solve this inequality and graph? (2x+5)/(x+1) > (x+1)/(x-1) would I first get rid of x-1 and divide x+1 over to get (2x+5)(x-1)/(x+1)(x+1) > 0 if so, then who would I graph this?
September 24, 2010 by Amy~
1) Solve for x in terms of k: log3(x) + log3(x+7) = k; 3 is the base 2) e^(x+5) = e^(x) + 6, solve for x. Please help, I have no idea how to do these and I've tried several times!
October 2, 2010 by Cornelius
precalc: elimating the parameter
hi, i'm having trouble understanding the concept of eliminating the parameter to obtain an equation in x and y alone. can anyone please solve this problem and explain it? thank you so much. x = 3T-4 y= = 1-2T (0<t<3) those signs are actually less than or equal to.
July 9, 2008 by joseph
precalc pre ap
If theta is a rotation angle that terminates in quadrant ll and sin of theta is 5/13, find cos of theta and tan of theta. Use the first Pythagorean identity to solve for cos of theta and use quotient identity to solve for tan of theta.
December 2, 2012 by lore
Find the amount of time required to double a dollar investment at 7.72%, if the interest is compounded continuously. 4.49 years 8.98 years 17.96 years I'm not understanding this, I got 3.9 years when I tried to solve this.
August 28, 2010 by Anonymous
Precalc HW (NO IDEA HOW TO SOLVE)
Low Earth orbiting satellites orbit between 200 and 500 miles above Earth. In order to keep the satellites at a constant distance from Earth, they must maintain a speed of 17,000 miles per hour. Assume Earth's radius is 3960 miles. a. Find the angular velocity needed to ...
November 19, 2007 by Amie
Okay for this question I know I am supposed to use the law of sines. But how can i tell what side is what? In right triangle ABC, a = 120 and c = 140, and ÐC is the right angle. Solve the triangle. Round to the nearest tenth, if necessary.
August 5, 2011 by anna
Which of the following describes the Enlightenment idea of natural law? The idea that people consent to government authority and in return the government protects their rights The idea that people are born with rights that no government can take away *** The idea of dividing ...
January 19, 2015 by jeje
check my precalc
#1. solve x^2-1<0 I got (-1,1) #2 x(x+1) >20 I got (-infinity, -4) U (5,infinity) #3 what is the domain of this function? f(x)= squre root of (x-3x^2) i got [-1/3,0] thanks!!!
October 1, 2012 by rebekah
What NaCl concentration results when 209 mL of an 0.660 M NaCl solution is mixed with 492 mL of a 0.270 M NaCl solution? __ mol/.209 L = 0.660 M __ mol/.492 L = 0.270 M .. I have no idea how to solve this. I have no idea why I even set up the equation above when it's asking me...
April 9, 2012 by Katherine
Solve. Give the answers in degrees so that 0° ≤ θ < 360°. 1) (5 cos θ - 1) / 2 = 1 answers: 53°, 127°, 233° 2) 3 cot (2θ) + 3 = 0 3) tan^2 θ + 2 sec^2 θ = 3 is my answer for #1 correct and i'm not sure how to do #2 and #3.
October 29, 2015 by owen
So I have two questions that have been puzzling me for quite some time and would really appreciate any help with either of them! (a) There are four positive intergers a, b, c, and d such that 4cos(x)cos(2x)cos(4x)=cos(ax)+cos(bx)+cos(cx)+cos(dx) for all values of x. Find a+b+c...
January 4, 2015 by majorbill
Social Studies--Check My 1 Answers Please--
What was "Manifest Destiny"? a. the idea that Americans of European descent were superior to Native Americans b. the idea that woman were destined to attain political equality with men c. the idea that America was destined to expand to cover the entire continent ******* d. the...
February 26, 2014 by Wendy
Solve tan(40/90) for the double angle cos(2theta). I know I use the x^2 + y^2 = r^2 formula and cos(2theta) = cos^2theta - sin^2theta. But I don't understand my answer
March 4, 2015 by Anna
Draw and solve any triangles satisfying alpha = 29 degrees a = 7 c = 14 I realize I need to draw a non-right triangle and label the sides but I am completely confused one what to do after I draw the triangle
November 13, 2012 by Greg
Determine the hydroxide ion concentration in a solution that is 0.0004 M HCl. Answer in units of M. I have no idea how to start, I just need to know what I need to solve for and hoe to set it up, I know the formula pOH^-=-log[OH^-] I just don't know where to plug things in and...
April 16, 2015 by will
Graph y=2csc(x-π) New period that I solve for 0<x-π<2π π<x<3π What is my quarter period? I got that it was 3π/4 but when I add this to pi 4 times o reach 4π instead of 3π. Please help.
October 11, 2015 by Maddy
I have a problem that I have no idea how to solve. The instruction say to solve and check the given equation by rational exponents. The equation is: x to the 5/2 power = 32. Can you show me how to do this step by step?
December 7, 2011 by ron
Noun means a person,place thing or idea. List 3 things for each. Person: teacher,doctor,nurse Place: park,school,store Thing: pen,notebook,book Idea: I need help with the idea Please help Thank you! idea: Peace, tranquility, hope, love, hatred. Ideas might be beauty, ...
December 18, 2006 by Muskan
Click on the box to choose whether each sentence restates the key idea expressed in the key sentence. Key Idea: When hot weather arrives and the nation takes to the outdoors, mishaps multiply. Drowning is the fourth most frequent cause of accidental deathin the summer. restate...
March 1, 2013 by ty
I have to write an essay on second hand lion about an important idea in the film and why it is a worthwhile idea in the film. I want to do the importance of the past because of the flash backs do you think this is the right idea and if so what should my 3 paragraphs be about
July 26, 2011 by Aryaman
the big idea of energy
i have to do an assesment about sound. i have to include the big idea of energy. i have no clue what it is! HHEELLPP MMEE!! What do you mean when you say "the big idea of energy"? I know that sound is created by vibrations, but I'm not sure thats exactly what you are looking ...
December 5, 2006 by Anon