Thursday

August 28, 2014

August 28, 2014

Total # Posts: 2,832

**pre-Cal(Please help)**

Use the law of cosines to find the angle Q between the given vectors. v = 3i + j w = 2i - j
*March 31, 2010*

**Math**

Use the law of cosines to find the angle Q between the given vectors. v = 3i + j w = 2i - j
*March 30, 2010*

**math**

collected for use in the approval process required by the U.S. Food and Drug Administration (FDA). Some participants were given a placebo, an inert substance that looks like the drug; others were given the drug. The data are shown in the following table: No Help Help Drug 22 ...
*March 30, 2010*

**math**

collected for use in the approval process required by the U.S. Food and Drug Administration (FDA). Some participants were given a placebo, an inert substance that looks like the drug; others were given the drug. The data are shown in the following table: No Help Help Drug 22 ...
*March 30, 2010*

**Math**

DOes a line have one or 2 arrows?
*March 30, 2010*

**5th grade**

How do i make a frequency table?
*March 30, 2010*

**Math(Please check)**

Find f X g , g X f , and f X f f(x) = 3sqrt x-1 g(x) = x^3 + 1 For f(x) the 3 is little above the sqrt sign. My answers were: f(g(x)) = 3sqrt x^3 + 1 -1 g(f(x)) = 3sqrt (x-1)^3 -1 f(f) = 3sqrt x-1-1 My teacher said these were wrong. Please help. I do not know how to correct ...
*March 30, 2010*

**Pre-Cal**

Find f X g , g X f , and f X f f(x) = 3sqrt x-1 g(x) = x^3 + 1 For f(x) the 3 is little above the sqrt sign. My answers were: f(g(x)) = 3sqrt x^3 + 1 -1 g(f(x)) = 3sqrt (x-1)^3 -1 f(f) = 3sqrt x-1-1 My teacher said these were wrong. Please help. I do not know how to correct ...
*March 29, 2010*

**Math**

Nevermind
*March 29, 2010*

**Math**

Find the exact value of the trigonometric function given that sin u = 5/13 and cos = -3/5 1) sin(u-v) My teacher said to make two right triangles and then find the missing parts by the pyth theorem. For the 5/13 triangle I got 12 and the other triangle I got 4. I do not know ...
*March 29, 2010*

**Math**

Thank You
*March 29, 2010*

**Math**

Find the exact value of the trigonometric function given that sin u = 5/13 and cos = -3/5 1) sin(u-v) My teacher said to make two right triangles and then find the missing parts by the pyth theorem. For the 5/13 triangle I got 12 and the other triangle I got 4. I do not know ...
*March 29, 2010*

**Pre-Cal(Urgent)**

Find f X g , g X f , and f X f f(x) = 3sqrt x-1 g(x) = x^3 + 1 For f(x) the 3 is little above the sqrt sign. My answers were: f(g(x)) = 3sqrt x^3 + 1 -1 g(f(x)) = 3sqrt (x-1)^3 -1 f(f) = 3sqrt x-1-1 My teacher said these were wrong. Please help. I do not know how to correct ...
*March 29, 2010*

**Pre-Cal(Please help)**

h(x) = 1/x-3 + 1 I know the vertical and horizontal asymptotes but I just need to know the domain. Please help. I am very confused.
*March 29, 2010*

**Pre-Cal**

Find f X g , g X f , and f X f f(x) = 3sqrt x-1 g(x) = x^3 + 1 For f(x) the 3 is little above the sqrt sign. My answers were: f(g(x)) = 3sqrt x^3 + 1 -1 g(f(x)) = 3sqrt (x-1)^3 -1 f(f) = 3sqrt x-1-1 My teacher said these were wrong. Please help. I do not know how to correct ...
*March 29, 2010*

**chemistry**

The maximum concentration set by the U.S. Environmental Protection Agency for lead in drinking water is 15 ppb. What is this concentration in milligrams per liter? How many liters of water contaminated at this maximum level must you drink to consume 1.0 ug of lead?
*March 28, 2010*

**Pre-Cal**

Use the law of cosines to find the angle of Q between the given vectors. v=3i + j w=2i - j
*March 28, 2010*

**Pre-Cal**

Find the component form of v given its magnitude and the anlge it makes with the positive a-axis. v=3 v in the direction 3i + 4J Would the component form be (3,4)?
*March 28, 2010*

**Pre-Cal**

Thank You!!
*March 28, 2010*

**Pre-Cal**

Find the magnitude and direction angle of the vector v. v= 8(cos135 degrees i + sin135 degrees J) I think that the answer is v= 5 and Q = 135. Am I correct?
*March 28, 2010*

**Pre-Cal**

Find the vector v with the given magnitude and the same direction as u. Magnitude: v=3 direction: u=(4,-4) I am not sure what to do here or how to start.
*March 28, 2010*

**Math(Correction)**

There are no parentheses used in the equation. Its just 1 over x-3 and then plus 1 is on the right side.
*March 27, 2010*

**Math**

give the domain of the function and identify any vertical or horizontal asymptotes. g(x)= 1 / x-3 + 1 My answer was x = o and y=3 but this was wrong. Please explain!!
*March 27, 2010*

**Math**

What is the midrange of {6,7,8,9,10,12,15,15,20,28}
*March 27, 2010*

**Pre-Cal**

use a graphing calculator to obtain the graph of the function. What do you observe about its asymptotes? g(x) = 4 [x-2] / x + 1 My answer was there are two horizontal asymptotes. My teacher said that there are two asymptotes but she wants me to find the equation for them. I ...
*March 26, 2010*

**Pre-Cal**

use a graphing calculator to obtain the graph of the function. What do you observe about its asymptotes? g(x) = 4 [x-2] / x + 1 My answer was there are two horizontal asymptotes but it was wrong.
*March 26, 2010*

**Pre-Cal**

Give the domain of the function and identify any vertical or horizontal asymptotes. h(x) = 1 / (x - 3) + 1 I had x = 0 and y = 3. Would the domain be all numbers except 1?
*March 26, 2010*

**Pre-Cal(Please help)**

Give the domain of the function and identify any vertical or horizontal asymptotes. h(x) = 1 / x - 3 + 1 I had x = 0 and y = 3. Would the domain be all numbers except 1?
*March 26, 2010*

**Pre-Cal**

Give the domain of the function and identify any vertical or horizontal asymptotes. h(x) = 1 / x - 3 + 1 I had x = 0 and y = 3. Would the domain be all numbers except 1?
*March 25, 2010*

**Pre-Cal**

what about the domain of 1/x. Would it be 0?
*March 25, 2010*

**Pre-Cal(Please help)**

Determine the domains of (a)f and (b) f X g f(x) = 1/x g(x)= x + 3 For the domain of f I had x > 0 and for f X g I had all real numbers but this was wrong.
*March 25, 2010*

**Pre-Cal**

Determine the domains of (a)f and (b) f X g f(x) = 1/x g(x)= x + 3 For the domain of f I had x > 0 and for f X g I had all real numbers but this was wrong.
*March 25, 2010*

**Pre-Cal**

Find two functions f and g such that (f X g)(x) = h(x). (There are many correct answers.) h(x) = 4 / (5x + 2)^2 = My answers were: f(x) = 4 / 5x, and g(x) = 5x + 2 Please explain. These answers were wrong and I do not know how to fix them!!
*March 25, 2010*

**Pre-Cal**

Find (a) f X g , (b) g X f, and (c) f X f f(x) = 3sqrt x-1 g(x) = x^3 + 1 For the f(x) the 3 is little above the sqrt sign. my answers were: (a) = 3sqrt x^4 -1 (b) = x^4 -1 (c) = 6sqrt x+1 These answers are wrong but I do not know how to do this
*March 25, 2010*

**Pre-Cal(Please help)**

Find two functions f and g such that (f X g)(x) = h(x). (There are many correct answers.) h(x) = 4 / (5x + 2)^2 = My answers were: f(x) = 4 / 5x, and g(x) = 5x + 2 Please explain. These answers were wrong and I do not know how to fix them!!
*March 25, 2010*

**Pre-Cal(Please help)**

Find (a) f X g , (b) g X f, and (c) f X f f(x) = 3sqrt x-1 g(x) = x^3 + 1 For the f(x) the 3 is little above the sqrt sign. my answers were: (a) = 3sqrt x^4 -1 (b) = x^4 -1 (c) = 6sqrt x+1 These answers are wrong but I do not know how to do this.
*March 25, 2010*

**Math **

42/56 in simplest form
*March 25, 2010*

**math**

what is the answer to this riddle. what should you say when u meet an angel
*March 24, 2010*

**Math**

Find two functions f and g such that (f X g)(x) = h(x). ( There are many correct answers. My answers were f(x) = 4/5x and g(x) = 5x + 2 but this was wrong. I do not know how to do this.
*March 23, 2010*

**Math(Please help)**

Find two functions f and g such that (f X g)(x) = h(x). ( There are many correct answers. My answers were f(x) = 4/5x and g(x) = 5x + 2 but this was wrong.
*March 23, 2010*

**Math**

Find two functions f and g such that (f X g)(x) = h(x). ( There are many correct answers. My answers were f(x) = 4/5x and g(x) = 5x + 2 but this was wrong.
*March 23, 2010*

**Pre-Cal(please check)**

I have to find the width of a river which is represented by a right trianle. The opposite side is labeled w and the adjacent side is 1oo ft. Theta is 54 degrees. Would my equation be opp = adjacent/cos(54)?
*March 23, 2010*

**Math**

NEVER MIND!!!!!!!
*March 23, 2010*

**Math**

Nick has done 35% of his homework. He had been working for 28 minutes. How long will it take him to finish his homework?
*March 23, 2010*

**Math**

solve for r There is a right triangle with the hypotenuse as r , the angle as 45 degrees and opposite side as 20. I am having a hard time finding this out. I had tan 45 = 1.61 20(1.61) = 32.4 but this is wrong.
*March 23, 2010*

**Pre-Cal(Please help)**

solve for r There is a right triangle with the hypotenuse as r , the angle as 45 degrees and opposite side as 20. I am having a hard time finding this out. I had tan 45 = 1.61 20(1.61) = 32.4 but this is wrong.
*March 23, 2010*

**Pre-Cal**

solve for r There is a right triangle with the hypotenuse as r , the angle as 45 degrees and opposite side as 20. I am having a hard time finding this out. I had tan 45 = 1.61 20(1.61) = 32.4 but this is wrong.
*March 23, 2010*

**Pre-Cal**

What is the domain of f/g? f(x) = x / x+1 g(x) = x^3 Please explain! Thank you
*March 22, 2010*

**sociology**

what is your experience with bureaucracy or a corporation. Say if it was a good or bad experience for you and why??
*March 22, 2010*

**algebra**

i meant james im sorry.. but i solved the problem on my own thank u tho
*March 22, 2010*

**algebra**

James invested some money at 12% interest. James also invested $188 more than 4 times that amount at 13%. How much is invested at each rate if Sang receives $2249.57 in interest after one year?
*March 22, 2010*

**Math**

Identify n(S) for the given set. S = {f, h,m, r} A) 4 B) 0 C) Infinite D) 3 is the answer c, since the given set can have a unlimted number of elements. or is it b, since the letters are not in order?
*March 21, 2010*

**Math**

Identify n(S) for the given set. S = {f, h,m, r} A) 4 B) 0 C) Infinite D) 3 is the answer c, since the given set can have a unlimted number of elements. or is it b, since the letters are not in order?
*March 21, 2010*

**Math**

Find two functions f and g such that (f x g)(x) = h(x). h(x) = 4 / (5x+2)^2
*March 21, 2010*

**Math**

2) Find f x g, g x f, and f x f f(x) = 3sqrt x-1 g(x) = x^3+1 For the f(x) the 3 is little above the sqrt sign. I do not understand how do find these.
*March 21, 2010*

**Math**

1)What is the domain of f/g? f(x) = x/x+1, g(x) = x^3 all real numbers greater than 1. Am I correct? 2) Find f x g, g x f, and f x f f(x) = 3sqrt x-1 g(x) = x^3+1 For the f(x) the 3 is little above the sqrt sign. I do not understand how do fidn these.
*March 20, 2010*

**Help!!!**

sin x / 1-cosx is equivalent to: sin x / 1 + cos x Is this right?
*March 19, 2010*

**Math(Urgent!!!)**

sin x / 1-cosx is equivalent to: sin x / 1 + cos x Is this right?
*March 19, 2010*

**Math**

solve for x: log4 X - log4 2 = 2 log(2x) = 2 Now what do I do?
*March 19, 2010*

**Math**

sin x / 1-cosx is equivalent to: sin x / 1 + cos x Is this right?
*March 19, 2010*

**Math**

Find the exact values of the vertical asymptotes for o is less than or equal to Q is less than or equal to pi for the function y= cot(3Q) I need to show my work for this one but I do not know how to do this.
*March 19, 2010*

**Math(Check)**

Given that tan(Q) = -3/4 and Q is in the second quadrant tell the value of the cosQ cos=-4/5 Correct?
*March 19, 2010*

**math (check)**

in which one quadrant is the cosecant negative and the secant positive. Quadrant 4. Is this correct?
*March 19, 2010*

**Math(Please Check)**

in which one quadrant is the cosecant negative and the secant positive. Quadrant 4. Is this correct?
*March 19, 2010*

**Math(Urgent)**

Find the exact values of the vertical asymptotes for o is less than or equal to Q is less than or equal to pi for the function y= cot(3Q) I need to show my work for this one but I do not know how to do this.
*March 19, 2010*

**Math(Please check)**

solve for x: log4 X - log4 2 = 2 log(2x) = 2 Now what do I do?
*March 19, 2010*

**Math**

use the sum and difference identities to find the cosine angle cos pi/9 cos pi/3 - sin pi/9 sin pi/3 I do not know how to solve this because pi/9 is not on the unit circle.
*March 17, 2010*

**Pre-Cal(Please check)**

1)f(x) = -x + sqrt 4 - x^2 Find f(-2) -(-2) + sqrt 4 - (-2)^2 = 2 + sqrt 4 + 4 2 + sqrt 8 = 4.828 Is this correct?
*March 16, 2010*

**Pre-Cal**

1)find f(g(x)) f(x) = x^2 + 2x g(x) = 1/x x^3 + 2x Is this correct? 2) solve: 3^x-1 = 10 ln 3/ ln 10 = .264 Is this correct? I am not sure how to do these. 3) Solve: 3^x+2 - 4 = 12
*March 15, 2010*

**Pre-Cal(Please help)**

1)(1-cos^2x)(csc x) ? Is this equal to sec x? 2) Expand: log7 3 sqrt x / x^2y 3) Find and simplify: f(g) F(x) = x^2 + 2x g(x) = 2x x^2 + 2x(2x) = x^2 + 4x Is this correct?
*March 15, 2010*

**language arts**

Fill in the blank: The president will _______ well- deserved honors on the retiring ambassador.
*March 15, 2010*

**Pre-Cal**

1)(1-cos^2x)(csc x) ? Is this equal to sec x? 2) Expand: log7 3 sqrt x / x^2y 3) Find and simplify: f(g) F(x) = x^2 + 2x g(x) = 2x x^2 + 2x(2x) = x^2 + 4x Is this correct?
*March 15, 2010*

**math**

Expand: log7= 3sqrtx / x^2y
*March 14, 2010*

**Math**

Expand: log7= 3sqrtx / x^2y
*March 14, 2010*

**Math(Please help)**

Solve log3 x + log3 8 = 4
*March 14, 2010*

**Math**

Solve log3 x + log3 8 = 4
*March 14, 2010*

**Scince**

What is hidrogen?
*March 11, 2010*

**Pre-Cal**

Find cos(2x) if sin = 7/25 and x lies in quadrant 1 My answer was 336/625 but this was wrong. I do not know how to figure this out.
*March 11, 2010*

**Pre-Cal**

1)tan 5 degrees + tan 25 degrees / 1 tan 5 degrees tan 25 degrees = sqrt 3 / 3 Am I correct? 2) Complete the identity tan^2Q - 3sinQtanQsecQ = -2tan^2Q Correct?
*March 10, 2010*

**Math(Please help)**

1)tan 5 degrees + tan 25 degrees / 1 tan 5 degrees tan 25 degrees = sqrt 3 / 3 Am I correct? 2) Complete the identity tan^2Q - 3sinQtanQsecQ = -2tan^2Q Correct?
*March 10, 2010*

**Math(Please help)**

1)tan 5 degrees + tan 25 degrees / 1 tan 5 degrees tan 25 degrees = sqrt 3 / 3 Am I correct? 2) Complete the identity tan^2Q - 3sinQtanQsecQ = -2tan^2Q Correct?
*March 10, 2010*

**Psychology**

he has a very strong id and a weak super ego
*March 8, 2010*

**Physics**

∆L = á Lo ∆T (25.054 cm - 25.000 cm) = á (25.000 cm)(102°C - 25°C) .054 = a(1925) 1925/.054 = 35648.14 Did I solve the equation correctly?
*March 6, 2010*

**Pre-Cal**

Perform the addition or subtraction. tanx - sec^2x/tanx tan^2(x)/tan(x) - sec^2x/tanx = tan^2x sec^2x / tanx then I use the identity 1+tan^2u=sec^2u I do not know what to do at this point.
*March 5, 2010*

**Pre-Cal**

Simplify the expression 1/tan^2x+1 tan^2x+1 = sec^2x = 1/sec^2x I am not sure what 1/sec^2x is equal to
*March 5, 2010*

**Pre-Cal**

Use the fundamental identities to simplify the expression. csc Q / sec Q so this would be 1/sinx / 1/cosx and then 1/sinx times cosx/1 = sin x cosx Is this correct so far? If it is I do not know what to do next.
*March 5, 2010*

**Pre-Cal**

Perform the multiplication and use the fundamental identities to simplify. (cotx + cscx)(cotx-cscx) I know that you have to foil first so cot^2x - csc^2x and then use the pythagorean identity 1+cot^2u = csc^2u but I do not know how to simplify.
*March 5, 2010*

**Math(Please help)**

Use the fundamental identities to simplify the expression. csc Q / sec Q so this would be 1/sinx / 1/cosx and then 1/sinx times cosx/1 = sin x cosx Is this correct so far? If it is I do not know what to do next.
*March 5, 2010*

**Math**

Perform the multiplication and use the fundamental identities to simplify. (cotx + cscx)(cotx-cscx) I know that you have to foil first so cot^2x - csc^2x and then use the pythagorean identity 1+cot^2u = csc^2u but I do not know how to simplify.
*March 5, 2010*

**Math(Please check)**

Use the fundamental identities to simplify the expression. tan^2 Q / sec^2 Q sin^2/cos^2 / 1/cos^2 = sin^2 / cos^2 times cos^2 / 1 = The cos^2 cancels out so sin^2 is left. Is this correct?
*March 5, 2010*

**Math**

Use the fundamental identities to simplify the expression. csc Q / sec Q so this would be 1/sinx / 1/cosx and then 1/sinx times cosx/1 = sin x cosx Is this correct so far? If it is I do not know what to do next.
*March 5, 2010*

**Math**

Match the trigonometric expression: cos^2 [(pi/2) - x] / cos x Does csc x match with this?
*March 5, 2010*

**Math**

Approximate the equation's solutions in the interval (0,2pi). sin2x sinx = cosx I know that I should work on the left side first. I know how to solve for the intervals but I am just not sure how to start this off.
*March 1, 2010*

**Math(Please help)**

1) Verify the identity cos^4x - sin^4x = cos2x I know that this is the difference of squares so (cos^2x)^2 - (sin^2x)^2 is this correct for the first step?
*March 1, 2010*

**Pre-Cal**

Perform the addition or subtraction and use the fundamental identities to simplify. tan x - sec^2 x / tan x I do not know where to start.
*February 28, 2010*

**Pre-Cal**

verify the identity sin x(1 - 2 cos^2 x + cos^4 x) = sin^5 x 1-2cos^2 x looks like 2cos^2x-1 its just backwards. I am not sure where to start.
*February 28, 2010*

**Pre-Cal**

1) verify the identity sec^2 (pi/2 - x) -1 = cot^2 x I think that we can replace sec with csc for the cofunction formulas since there is pi/2. Since there is squared and a 1 I think we could use one of the pythagorean identites but I am not sure which one.
*February 28, 2010*

**Pre-Cal**

1) Verify the identity cos^2 B - sin^2 B = 2 cos^2 B -1 I know that cos^2 B - sin^2 B = 2 cos^2 B -1 by the double angle formula but I do not know how to show this.
*February 27, 2010*

**math**

Can someone help me with my math problem? Thank you Write the integer represented by each of the following: a. A collection of 9 red counters and 4 black counters. b. A collection of 7 red counters and 18 black counters. c. A point midway between –45 and 45 on the number ...
*February 25, 2010*

**Math**

Hello, Can someone help me with my math problem? Does |k – n| = |k| – |n| for all integers k and n? If so, give 3 examples.If not, give a counterexample.
*February 25, 2010*

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