Friday

April 18, 2014

April 18, 2014

Total # Posts: 42

**Math**

The bases of trapezoid ABCD are AB and CD. Let P be the intersection of diagonals AC and BD. If the areas of triangles ABP and CDP are 8 and 18, respectively, then find the area of trapezoid ABCD.

**Math**

Solution 1: Triangles ADE and BFE are similar since \overline{AD}\parallel\overline{BF}. Furthermore, the ratio of their areas is 9:1, so AE/BE = 3. Then CD = AB = AE + BE = 3BE + BE = 4BE. Triangles FEB and FDC are similar, so the area of triangle FDC is (DC/BE)^2 \cdot [FEB]...

**Math**

Let ABCD be a parallelogram. Let M be the midpoint of AB and N be the midpoint of AD. Diagonal BD intersects CM and CN at P and Q, respectively. Find PQ/BD.

**physics**

CHEATER!!! DO NOT POST ANSWERSS

**Physics**

20

**Probability**

20

**calculus**

A water-trough is 10m long and has a cross-section which is the shape of an isosceles trapezoid that is 30cm wide at the bottom, 80cm wide at the top, and has height 50cm. If the trough is being fi lled with water at the rate of 0.2 m3/min, how fast is the water level rising w...

**calculus**

Find a number x0 between 0 and pi such that the tangent line to the curve y = sin x at x = x0 is parallel to the line y = -x=2. I get that for both lines to be parallel to each other their slopes need to be the same. I found -1/2 = cos(x) but I get stuck here. What exactl...

**calculus**

So y'(0) = 0 because there is a horizontal tangent at x = 0?

**calculus**

Find a function f such that the curve y = f(x) satisfies y'' = 12x, passes through the point (0,1), and has a horizontal tangent there. I can use the anti-derivatives to get y = 2x^3 + Cx + D but I don't know how to get C even though I know D = 1.

**calculus**

y = x^3*

**calculus**

The point (1,5) isn't on the graph of y^x^3. It is just a point on the tangent of the graph y = x^3. Sorry if I wasn't clear before.

**calculus**

Find the equation of a straight line that passes through a point (1,5) and tangent to curve y = x^3

**calculus**

A man starts walking north at 4ft/s from a point P. Five minutes later a woman starts walking south at 5ft/s from a point 500 ft due east of P. At what rate are the people moving apart 15 min after the woman starts walking? I'm confused about the diagram and what to do wit...

**statistics**

asdf

**Chemistry**

ds

**whole number**

12

**Chemistry**

asdf

**physics**

5/8L is the answer for future students who is taking physic class. yw

**physics**

it's not 3/4L or 1/4L

**physics**

DENSITY=MASS/VOLUME =24/4=7

**Math; Complete the square for the expressions**

I meant, "Why isn't (25/2)^2 (25/4)?"

**Math; Complete the square for the expressions**

I have a number of problems I'm having problem with but they start with the example given in the book 2x^2 - 10x =2(x^2 - 5x) =2{[x-(5/2)]^2 - [(5/2)^2]} =2[x-(5/2)]^2 - (25/2) Why isn't (5/2)^2 (25/4)? I'm struggling with the exercises as well. 3x^2 - 24x I get 3(...

**Math(College Algebra)**

Thanks

**physic**

3 meters tall

**chem**

How does a gas differ from a liquid with respect to the following property: Ability to mix with other substances of the same phase to form homogeneous mixtures Gases form homogeneous mixtures with each other regardless of the identities or relative proportions of the component...

**Science**

to go away by a chemical reaction

**AP Physics**

dfsa

**fin. am I correct?**

DCL= % Change in EPS/ % Change in Sales = DOL x DFL

**Biology**

lol, BGYA02 at UTSC. I'm doing that assignment too :P

**English grammar**

In the following sentence, what part of speech is the word "spent": This meant time spent working was wasted.

**english**

Concerning my past question, is "working" the only word in the gerund phrase and my teacher said that it "working" wasn't a DO. No one in my class could figure out the answer.

**Study Tips**

Sit in your own quiet place without any noise. If you don't get distracted, you can listen to soft music which helps calm your nerves or tension. Scientists also prescribe lighting a mint smelling candle or something that smells minty to help stimulate your mind.

**English**

What is the gerund phrase and does it act as a direct object, subject, or etc. in the following sentence: This means time spent working was wasted.

**biology test**

Numbers 2 and 3 are right for sure. I don't know about number 1

**MATH**

HAHAHAHAAHHAHAHAHAHAHAAHHAHAH

**math**

x = 2 y = 1/2 now stop posting the same question 20 billion times.

**C++**

#include <iostream.h> #include <stdlib.h> int main ( ) { int choice; cout << "Computer Repair" << endl; cout << "\n Does your ailing computer beeps multiable times at startup?" << endl; cin >> choice; switch (choice...

**Physics**

4.8 m/s^2

**Advanced Production**

sadrhasd

**Physics**

aveagg

**physics**

3 meters is the total distance 1.5 for each one

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