Saturday

April 19, 2014

April 19, 2014

Number of results: 16,900

**GEOMETRY**

If ABC ~ DEF and the scale factor from ABC to DEF is 1/6, what are the lengths of DE,EF , and DF, respectively?
*Wednesday, February 26, 2014 at 11:54am by QUILO*

**geomerty**

if triangle ABC is congruent to triangle def the perimeter of ABC IS 23INCHES what is the length(in inches) of side DF IN DEF
*Wednesday, May 11, 2011 at 1:11am by adkja*

**geomerty**

if triangle ABC is congruent to triangle def the perimeter of ABC IS 23INCHES what is the length(in inches) of side DF IN DEF
*Wednesday, May 11, 2011 at 1:11am by adJA*

**math**

angle ABC and DEF are supplementary angles. the measure of DEF is 20 degrees less than 3 times the amount of ABC. what are ABC and DEF.
*Thursday, January 24, 2013 at 7:49pm by hunter*

**geomerty**

The following triangles, Ä ABC and Ä DEF, are congruent. abc 67.38degree 12cm lenght 22.62degree b5cm,l,13cm Find the lengths of all missing sides and measures of all angles for both triangles. Include correct units with each of your answers. First triangle: Second triangle: ...
*Wednesday, May 11, 2011 at 1:11am by kozy*

**algebra**

Triangles ABC and DEF are similar. Find the perimeter of triangle DEF. Round your answer to the nearest tenth. ab=4ft bc=6ft ac=5ft de=6ft ef= 9ft there is no feet given for df Please can anyone help me solve this with steps I don't understand how to do this. Thanking you in ...
*Friday, March 1, 2013 at 1:11pm by sally*

**geometry**

DEF and ABC are complementary angles and ABC is nine times as large as DEF. Determine the measure of each angle.
*Wednesday, June 27, 2012 at 8:54am by angela *

**Math**

Find the missing sides of the similar triangles ABC and DEF. AC=2 AB=5 CB=? DF=4 FE=8 DE=?
*Wednesday, November 13, 2013 at 6:51pm by Heather*

**geometry**

Triangle ABC is similar to triangle DEF. The sides of ABC are 5,8 and 11. What is the length of the shorttest side of DEF if its perimeter is 60?
*Tuesday, June 18, 2013 at 9:01pm by mily*

**geometry**

DEF + ABC = 90 DEF + 9DEF = 90 10DEF = 90 DEF = 9 ABC = 81
*Wednesday, June 27, 2012 at 8:54am by Steve*

** Math For Educator**

If the triangles are similar, write a similarity statement and give a reason why they are similar. If you cannot confirm that the triangles are similar, indicate "Not necessarily similar." 9) 9) _______ A) ¢ABC ~ ¢DEF, SAS Similarity Theorem B) ¢ABC ~ ¢DEF, Right Triangle ...
*Sunday, May 30, 2010 at 10:49pm by RED*

**algebra**

Triangles ABC and DEF are similar. Find the area of triangle ABC. Round your answer to the nearest tenth. the answer should be __________m^2 triangle abc has a 12m. triangle def has 12m and 18m.
*Saturday, March 9, 2013 at 10:26pm by sally*

**geometry**

triangle abc is similar to def, the lengths of the sides of triangle abc is 5,8,11. what is the length of the shortest side of triangle def if its perimeter is 60?
*Thursday, February 28, 2013 at 6:22pm by c*

**geometry**

In similar triangles ABC and DEF, corresponding sides AB and DE equal 15 and 12, respectively. If the perimeter of triangle ABC=40, what is the perimeter of triangle DEF
*Tuesday, September 28, 2010 at 8:16pm by Saw Phone Thet*

**Math**

If triangle ABC is similar to triangle DEF and the perimeter of ABC is 4 times greater than the perimeter of DEF , what is the relationship between the areas of the triangles?
*Thursday, July 12, 2012 at 11:02pm by DAN*

**Precalculus**

In most geometry courses, we learn that there's no such thing as "SSA Congruence". That is, if we have triangles ABC and DEF such that AB = DE, BC = EF, and angle A = angle D, then we cannot deduce that ABC and DEF are congruent. However, there are a few special cases in which...
*Monday, February 24, 2014 at 5:18pm by John*

**Trigonometry/Geometry**

In most geometry courses, we learn that there's no such thing as "SSA Congruence". That is, if we have triangles ABC and DEF such that AB = DE, BC = EF, and angle A = angle D, then we cannot deduce that ABC and DEF are congruent. However, there are a few special cases in which...
*Tuesday, November 19, 2013 at 1:47pm by Sam*

**geometry**

<DEF and <ABC are supplementary angles and <DEF is seven times as large as <ABC. Determine the measures of each angle. Students must show all work step by step to receive full credit.
*Thursday, March 10, 2011 at 4:47pm by Terri Search *

**Geometry**

If ∆ ABC ~ ∆ DEF, BC = 12 cm, EF = 10 cm, and AC = 18 cm, find DF.
*Tuesday, January 11, 2011 at 8:49pm by Dave*

**Math**

If ∆ ABC ~ ∆ DEF, BC = 12 cm, EF = 10 cm, and AC = 18 cm, find DF.
*Wednesday, January 12, 2011 at 12:02pm by James*

**algebra**

Triangles ABC and DEF are similar. Find the perimeter of triangle DEF. Round your answer to the nearest tenth.
*Friday, March 1, 2013 at 12:59pm by sally*

**Trigonometry/Geometry - Law of sines and cosines**

In most geometry courses, we learn that there's no such thing as "SSA Congruence". That is, if we have triangles ABC and DEF such that AB = DE, BC = EF, and angle A = angle D, then we cannot deduce that ABC and DEF are congruent. However, there are a few special cases in which...
*Thursday, November 21, 2013 at 4:03pm by Sam*

**geometry**

Suppose right triangle ABC has one acute angle 47º. Suppose also that right triangle DEF has an acute angle 43º. How are triangles ABC and DEF related?
*Tuesday, September 20, 2011 at 11:40pm by Blanca*

**Math Geometry**

Geometry Question: Prove the symmetric Property for congruence of triangles. Given: ∆ABC≅ ∆DEF Prove: ∆DEF≅ ∆ABC
*Wednesday, May 18, 2011 at 8:27am by Reigel*

**geometry**

Is this statement always true, sometimes true, or never true? give angle ABC and DEF, if angle A = angle D, angle B = angle E, and angle C = angle F, then angle ABC is congruent to angle DEF
*Sunday, May 30, 2010 at 8:58pm by Anonymous*

**math**

The base of triangle ABC is one half the altitude.The altitude of triangle DEF is one half its base. If both triangles are equal in area, what is the ratio of the altitude of triangle ABC to the altitude of triangle DEF ? a. 1:4 b. 1:2 c. 1:1 d. 2:1 e. 4:1 please answer and ...
*Saturday, April 19, 2014 at 1:18pm by thomas*

**geometry**

"Triangle DEF is similar to triangle ABC, and the length of side DE is 6 cm. The length of side AB is 2 cm. If the area of triangle ABC is 5 square cm, what is the area of triangle DEF?
*Wednesday, July 6, 2011 at 6:16pm by Anonymous*

**math**

the number is abc,def,ghi d=5 so abc,5ef,ghi f=d+3, so abc,5e8,ghi a=f/2=4, so 4bc,5e8,ghi b=a+d=9, so 49c,5e8,ghi rest=0, so 490,508,000
*Saturday, July 14, 2012 at 2:15pm by Steve*

**geometry**

An arc ABC is one quarter of a circle with center B and radius 6. Rectangle EDFB is inscribed in ABC. If ED + DF = 8, find the perimeter ADCFE. Round your answer to the nearest hundredth.
*Tuesday, November 30, 2010 at 6:27pm by antonne*

**geometry**

In triangle DEF, DF = 16 and m< F = 26. Find FE to the nearest tenth.
*Sunday, July 11, 2010 at 2:57pm by stone*

**geometry**

if <def < abc then <def <abc
*Wednesday, October 14, 2009 at 9:14pm by vanessa*

**geometry**

ABC = X deg. DEF = 7X deg. x + 7x = 180 deg. 8X = 180, X = ABC = 22.5 deg. 7X = DEF = 7 * 22.5 = 157.5 deg.
*Thursday, March 10, 2011 at 4:47pm by Henry*

**geometry**

we are a team of students studying for a test - asking again - thanks - An arc ABC is one quarter of a circle with center B and radius 6. Rectangle EDFB is inscribed in ABC. If ED + DF = 8, find the perimeter ADCFE. Round your answer to the nearest hundredth.
*Tuesday, November 30, 2010 at 9:55pm by antonne*

**Geometry-PLEASE CHECK ANSWERS!**

In isosceles triangle DEF, DE=DF. Which of the following is true? 1) <D is congruent to <E 2) <F is congruent to <E 3) <D is congruent to <F 4) <D is congruent to <E which is congruent to <F Is the answer (3)? In triangle ABC, if line AB is congruent...
*Tuesday, February 23, 2010 at 7:33pm by Laurie*

**math**

Triangle DEF is such that DF=8cm,EF=5.5cm and its area is 11 root2 cm^2. Find angle EFD.
*Saturday, May 18, 2013 at 7:35pm by lindsay*

**geometry**

in angle DEF, DF equals 16 and F equals 26. Find FE to the nearest tenth.
*Wednesday, May 4, 2011 at 2:00pm by gage*

**adult ed geometry**

Adult education due to the level -thanks - An arc ABC is one quarter of a circle with center B and radius 6. Rectangle EDFB is inscribed in ABC. If ED + DF = 8, find the perimeter ADCFE. Round your answer to the nearest hundredth.
*Wednesday, December 1, 2010 at 12:00pm by antonne*

**statistics**

A researcher uses an analysis of variance to test for mean differences among three treatment conditions using a sample of n = 8 participants in each treatment. What degrees of freedom (df) would the F-ratio from this analysis have? a. df = 23 b. df = 2, 23 c. df = 3, 21 d. df...
*Thursday, November 15, 2012 at 3:40am by Robbie*

**geometry**

given: line DF congruent line EF; line DF perpendicular line AB; line EF perpendicular BC. prove line BF bisects angle ABC
*Tuesday, September 27, 2011 at 4:10am by Anonymous*

**Geometry (math)**

If the bases are ABC and DEF, then the sides could be ABDE and BCEF, intersecting along the line BE.
*Monday, November 18, 2013 at 11:46pm by Steve*

**geometry**

A circle has a radius of 3 feet and a central angle DEF that measures 60°. What is the length of the intercepted arc DF? Use 3.14 for pi and round your answer to the nearest tenth.
*Friday, July 2, 2010 at 9:13am by ashley!(:*

**geometry**

Your question is not clear. "if df equals 300m, find df. round to the nearest tenth." Find df? df = 300m
*Friday, February 18, 2011 at 8:26am by Helper*

**geometry**

In triangle DEF, A(2,3) is the midpoint of DE, B(4,1) is the midpoint of EF, and C(6,2) is the midpoint of DF. What are the coordinates of D, E, and F?
*Thursday, December 9, 2010 at 11:08pm by billy*

**Math (Geometry)**

The perimeter of right triangle ABC is equal to the perimeter of isosceles triangle DEF. The lengths of the legs of the right triangle are 6 and 8. If the length of each side of the isosceles triangle is an integer, what is the greatest possible length for one of the sides of ...
*Tuesday, August 7, 2012 at 3:11pm by ANONYMOUS*

**Math**

In my table of my stats book, with 20 df, r = .4227 and with 25 df, r = .3809 are both significant at P = .05. You will need to interpolate for df = 21.
*Friday, January 27, 2012 at 1:57am by PsyDAG*

**algebra**

Similar triangles have similar ratios DE / AB = 6/4 = 3/2 EF/BC = 9/6 = 3/2 So we know that DF / AC = 3/2 We are given that AC = 5 So, DF / 5 = 3/2 We cross multiply to get 15 = DF x 2 So, DF = 15/2 And, to the nearest tenth it is equal to 7.5
*Friday, March 1, 2013 at 1:11pm by Knights*

**Calc**

f(u) = u/(u^2-1) df/du = [(u^2-1) - 2u^2]/(u^2-1)^2 = - (u^2+1)/(u^2-1)^2 fog is just f(g(x)) = f(u) so, (fog)' is just d/dx(f(g(x)) = df/dx df/dx = df/du * du/dx = -(u^2+1)/(u^2-1)^2 * (6x+1) u(0) = 3 f'(3) = -10/8^2 * 1 = -5/32 I don't see that as one of the choices, but I ...
*Tuesday, November 29, 2011 at 12:54pm by Steve*

**geometry**

assuming we're talking abou a triangle DEF, just add up the sides and solve for x: 3x+1 + x+5 + x+5 = 31 5x + 11 = 31 x = 4 DE=EF=9 DF = 13
*Tuesday, October 9, 2012 at 8:57am by Steve*

**geometry**

ABC is congruent to DEF AB = 11, BC = 14, CA = 20, FD = 4x - 12 Find x
*Sunday, November 20, 2011 at 6:01pm by T*

**math**

Triangles ABC and DEF are similar. The similarity ratio of to is , AB = 40, BC = 25, and AC = 35. What is the perimeter of ?
*Wednesday, May 22, 2013 at 6:55pm by angie*

**Math**

In rhombus DEFG, if m<DEF=60, and the shorter diagonal DF has a length of 7, find the length of the side of a rhombus.
*Friday, March 5, 2010 at 3:44pm by Chris*

**maths**

D,E,F are the midpoints of a triangle ABC then what is the area of triangle DEF?
*Monday, March 26, 2012 at 11:15am by help me out it's urgent*

**math**

I have to assume you know the chain rule. if x is a function of t, and f is a function of x, then df/dt=df/dx * dx/dt this is a fundamental relationship in calculus.
*Friday, December 18, 2009 at 12:42pm by bobpursley*

**geometry**

because of similar triangles, each side of triangle DEF is 12/15 or 4/5 as long as the corresponding sides of ABC in first a+b+15 = 40 a+b = 25 in DEF perimeter = e+d + 12 = (4/5)b + (4/5)a + 12 = (4/5)(b+a) + 12 = (4/5)(25) + 12 = 32 Or by just "common sense" if each side is ...
*Tuesday, September 28, 2010 at 8:16pm by Reiny*

**Calc**

e^x/y^2= 8 + e^y ----> e^x = 8 y^2 + y^2 e^y So, in this case, we can solve for x in terms of y. Then you can simply consider x to be a fnction of y, differentiate w.r.t. y, yielding dx/dy and dy /dx is then 1/(dx/dy). But in general, you can't solve for either x or y. Then...
*Sunday, October 2, 2011 at 8:40pm by Count Iblis*

**UPDATE to Ms Sue**

If JKL is similiar to DEF and JKl has sides that are 11 times greater than those of DEF what is the relationship between the perimeters of the triangles A. They are equal. B.The perimeter of DEF is 11 times greater than the perimeter of JKL. C. The perimeter of JKL is 11 times...
*Wednesday, June 13, 2012 at 5:00pm by Katie*

**Math**

The triangles are similar (but not congruent). That means that corresponding sides are all in the same ratio. BC/EF = 12/10 = AC/DF = 18/DF DF = 18*(5/6) = 15
*Wednesday, January 12, 2011 at 12:02pm by drwls*

**algebra**

A diagram would be nice. assuming DE ~ AB let the sides of DEF be d,e,f. let the sides of ABC be a,b,c. a/b = d/e a/c = d/f etc. When we are given lengths, plug them in
*Friday, March 1, 2013 at 12:59pm by Knights*

**Math**

in triangle DEF,<D=50 degree, DE=14 meters, and DF=10 meters. find the area of triangle DEFto the nearest tenth of a square meters
*Sunday, April 7, 2013 at 12:09pm by Alex*

**geometry**

describe the 2 transformations, the first followed by the second that combined will transform triangle ABC and triangle DEF. 23) A(-3,3), B(-3,1), C(0,1) D(6,6), E(6,2), F(0,2) 24)A(6,0), B(9,6), C(12,6) D(0,3), E(1,5), F(2,5)
*Monday, December 19, 2011 at 9:37pm by Anonymous*

**11th grade math**

in triangle DEF,<D=50 degree, DE=14 meters, and DF=10 meters. find the area of triangle DEFto the nearest tenth of a square meters
*Sunday, April 7, 2013 at 12:10pm by Alex*

**Calculus**

the chain rule can get things started: Q = f(f-g) = f(u) dQ/dx = df/du (df/dx - dg/dx) without some more info on f and g, it's a bit hard to elaborate on df/d(f-g)
*Monday, October 15, 2012 at 11:52am by Steve*

**Calculus **

linear approximation means get the slope. df/dx=-2(2x)/(1+x^2)^2 at at x=3.25, df/dt= -4*3.25/(1+3.25^2)^2=-.0972 df=-.0972*x but x= 3.5-3=.5 df=-.0488 actual f(3)=2/(10)=1/5 f(3.5)=2/(1+3.5^2)=.150 f(3.5-f(3)=-.050 error (.0488-.050)/.050 about 2 percent f(3.5)-f(3)=-.350
*Sunday, October 30, 2011 at 6:48pm by bobpursley*

**LANG**

The denotative def of a word is the dictionary def. The connotative is what it means to an individual.
*Saturday, February 18, 2012 at 5:20pm by elbillaf*

**statistic**

Your ANOVA summary table has the following setup: Source.....SS.....df.....MS.....F Between Within Total Fill in the data with what you know, then find what you don't know. Here are a few hints: SS total = SS between + SS within To calculate df between: k - 1 Note: k = number ...
*Tuesday, August 28, 2012 at 12:19pm by MathGuru*

**Geometry**

ABC is an acute triangle with \angle BCA = 35 ^\circ. Denote the circumcenter of ABC as O and the orthocenter of ABC as H. If AO=AH, what is the value of \angle ABC (in degrees)?
*Tuesday, March 26, 2013 at 11:31pm by Dan*

**maths**

ABC is an acute triangle with \angle BCA = 35 ^\circ. Denote the circumcenter of ABC as O and the orthocenter of ABC as H. If AO=AH, what is the value of \angle ABC (in degrees)?
*Saturday, March 30, 2013 at 8:57am by rohit*

**maths**

ABC is an acute triangle with ∠BCA=35∘. Denote the circumcenter of ABC as O and the orthocenter of ABC as H. If AO=AH, what is the value of ∠ABC(in degrees)?
*Saturday, March 30, 2013 at 10:37am by stranger*

**Calculus-Solved**

this is wrong. but can you explain how to correct it? thanks use differential of x^-1/3 to approximate solution to (1/cube root(7.952)) differential: df= -1/3(x^(-4/3)) * dx df= -1/48 * 0.0048 df= -0.001 0.500 - 0.001 = 0.499 but this is wrong.
*Saturday, May 4, 2013 at 6:49pm by Alaina*

**English**

What could I use as a memory clue (or picture) for the following words? Evicted: Def. To force out. Requisitioned: Def. Demand, or urgently ask for something for military needs.
*Saturday, August 23, 2008 at 1:23pm by Tommy*

**maths**

abc(a^2bc+ab^2c+abc^2-3) = abc(abc(a+b+c)-3).
*Wednesday, August 3, 2011 at 11:54am by Henry*

**math**

Write a sequence of transformations that maps triangle ABC onto triangle A''B''C''. --------------------------------------… A in ABC is 1,9, B in ABC is 3,12, and C in ABC is 4,4. A'' in A''B''C'' is 3,-3, B'' in A''B''C'' is 5,-6, and C'' in A''B''C'' is 6,2.
*Wednesday, January 23, 2013 at 4:11pm by kayla*

**English**

What could I use as a memory clue (or picture) for the following words? Requisitioned: Def. Demand, or urgently ask for something for military needs. Derogatory: Def. To make a remark that belittles someone else
*Sunday, August 24, 2008 at 11:44am by Tommy*

**Physics**

I assume that Theta is up and down from horizontal calling theta = A d sin A /dA = cos A d sin A/dt = d sin A/dA * dA/dt so d sin A /dt = cos A (dA/dt ) similarly d cos A/dt = -sin A dA/dt That settled, let's look at the problem Force = m * a a = F/7 da/dt = (1/7) dF/dt F in ...
*Tuesday, January 21, 2014 at 3:05pm by Damon*

**Calculus**

Chain rule: df(x^2)/dx =df(x^2)/d(x^2).dx^2/dx =df(x^2)/d(x^2).2x
*Monday, October 17, 2011 at 12:48pm by MathMate*

**math**

Triangle DEF with vertices D(2,5), E(1,-6), and F(-5,3) is translated 3 units right and 2 units down. Find the coordiantes of DEF.
*Thursday, November 13, 2008 at 8:34pm by Sha*

**Calculus**

Use the fact that , for f(u) = arcsin u, df/du = 1 / sqrt(1 - u^2) Use the chain rule: df/dx = df/du* du/dx Let u = 3x, so du/dx = 3 df/dx = 3 / sqrt(1 - 9x^2)
*Friday, October 5, 2007 at 9:55pm by drwls*

**Update**

If JKL is similiar to DEF and JKl has sides that are 11 times greater than those of DEF
*Wednesday, June 13, 2012 at 4:44pm by Katie*

**Calculus-Differentials-Check please?**

if the sides of a cube are measured with an error of 2% use differentials to estimate the relative error in the volume df= 3x^2 * dx df= 3x^2 * 1/50 df= 3/50*x^2 is this right?
*Tuesday, April 23, 2013 at 4:09pm by Liliana*

**biology**

Lol i'm def nottt in catholic school. How can you know when to re check my paper i def want u to check it. ill post on later im working on it right now.
*Thursday, February 3, 2011 at 3:58pm by chelsea salam*

**geometry**

the ratio of areas of two similar shapes is proportional to the square of their corresponding sides so area DEF/5 = 6^2 / 2^2 = 36/4 = 9/1 area DEF = 45
*Wednesday, July 6, 2011 at 6:16pm by Reiny*

**Spanish 8th grade-Could someone please check this**

Mexico DF is the word for Mexico City in Spanish I think that is false because they either say Mexico or el DF referring to Districto Federal, correct? They never say Mexico DF do they?
*Monday, May 23, 2011 at 12:44pm by Rita Z.*

**calculus**

f(x,y) = xy = x (4x-3) f = 4 x^2 - 3x df/dx = 8 x - 3 that is 0 when x = 3/8 and the second derivative is positive so it is a minumum then x y = (3/8)(3/2 -3) = (3/8) (-3/2) = -9/16 we found df/dx now df/dy 4x = y+3 x = (y+3)/4 g(y) = xy = y(y+3)/4 = (1/4)(y^2+3y) dg/dy = (1/4...
*Sunday, January 6, 2008 at 6:31pm by Damon*

**Geometry**

by ratios DF/10 = 18/12 solve for DF
*Tuesday, January 11, 2011 at 8:49pm by Reiny*

**Math**

by ratios DF/10 = 18/12 solve for DF
*Wednesday, January 12, 2011 at 12:02pm by helper*

**Geoometry Help: Find EF**

ABC~DEF AB = 36, BC = 24, DE = 48 m<B = 110', m<E = 110' EF = ? I think it's 68. Yes? Or is something else?
*Friday, March 29, 2013 at 2:37pm by Michelle*

**STAT**

Calculate SP (the sum of products of deviations) for the following scores. Note: Both means are decimal values, so the computational formula works well. X Y 0 2 0 1 1 0 2 1 1 2 0 3 Assume a two-tailed test with .05. (Note: The table does not list all the possible df values...
*Sunday, March 3, 2013 at 11:30pm by Tracy*

**MATH URGENT!**

Ok I don't understand how to find similar figures when using proportions. Can someone explain it to me? Two figures that have the same shape are said to be similar. When two figures are similar, the ratios of the lengths of their corresponding sides are equal. To determine if ...
*Tuesday, April 24, 2007 at 8:48pm by Ashley*

**Urgent math**

using x' for dx/dt, etc, dF/dt = Fx x' + Fy y' + Fz z' = 3cos(3x-yz)(e^(t-1)) - zcos(3x-yz)(3t^2) - ycos(3x-yz)(1) at t=1, dF/dt = 3cos(4)(1) + cos(4)(3) - cos(4)(1) = 5cos(4) Hard to see what the difficulty is; they gave you the formula for df/dt, as well as the values for t,...
*Saturday, April 20, 2013 at 5:24pm by Steve*

**statistics**

Yes there is enough evidence to support---- T = (16-15.6)/(.3/sqrt(8)) df = n-1 df = 8-1 = 7 critical t value = 1.895
*Friday, August 2, 2013 at 12:44am by Anonymous*

**statistics**

Yes there is enough evidence to support---- T = (16-15.6)/(.3/sqrt(8)) df = n-1 df = 8-1 = 7 critical t value = 1.895
*Friday, August 2, 2013 at 12:44am by Chol*

**Statistics**

Here are a few hints to help you fill in your ANOVA table: SS total = SS between + SS within To calculate df between: k - 1 Note: k = number of levels. To calculate df within: N - k Note: N = total number of values in all levels. df total = df between + df within To ...
*Tuesday, March 19, 2013 at 9:34pm by MathGuru*

**math**

a. f(t) = e^[tan (pi *t)] Let u = tan (pi t) f(u) = e^u df/dt = df/du du/dt du/dt = pi * sec^2 (pi t) df/du = e^u df/dt = pi* e^[(tan (pi*t)]*sec^2 (pi*t) b) Let u = 8 + ln z f(z) = f[u(z)]) = sqrt u Use the chain rule, as I did in (a) df/dz = df/du*du/dz
*Sunday, October 28, 2007 at 4:37am by drwls*

**Directional derivative**

df(x,y)/dx = 2x df(1,2)/dx = 2 df(x,y)/dy = -2y df(1,2)/dy = -4 Directional derivative = = <2,-4> • <(3/5),-(4/5)> = (6/5) + (16/5) = 22/5
*Sunday, February 27, 2011 at 11:25pm by agrin04*

**geometry**

solve this proof: PR is congruent to DE, PT is congruent to DF, Angle R is congruent to Angle E, Angle T is congruent to Angle F.. Prove Triangle PRT is congruent to Triangle DEF
*Sunday, November 6, 2011 at 10:27pm by Maddie*

**Geometry**

Given: Triangle ABC ~ Triangle DEF, m<A = 50o, m<D = 2x + 5y, m<F = 5x + y, and m<B = 102 - x. What is the measurement of <F?
*Monday, March 14, 2011 at 11:44pm by mic*

**statistics**

abc def ghi <em>jkl</em> mno
*Monday, November 26, 2012 at 8:13pm by Anonymous*

**geometry**

the angle of depression from d to f measures 10 degrees. if df equals 300m, find df. round to the nearest tenth.
*Friday, February 18, 2011 at 8:26am by tyler*

**Calculus**

Derivative Differentiate f(x)=(5x-4)^2 There are two ways to do this: (1) let u = 5x-4, and use the "chain rule", df/dx = df/du * du/dx OR (2) expand the polynomial to f(x) = 25 x^2 -40x + 16 and differentialte it term-by-term. You will get the same answer either way. Let's ...
*Monday, February 26, 2007 at 10:52am by Dee*

**math**

I assume they mean find angle ABC I would find vector BA then find vector BC then use either dot or cross product, dot product might be easier BA dot BC = |BA| |BC| cos (ABC) solve for ABC
*Saturday, December 24, 2011 at 10:45pm by Damon*

Pages: **1** | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | Next>>