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August 28, 2014

Posts by Hannah


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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