Mathematics - 8 November 2007

i know the answer is f + d over c, but how would I show work for that? A statement counts as work, but I cant think of what to write. All help is appreciated. Thank you very much.

2007-11-08 10:30:53 · 12 answers · asked by Alfonso G 1

Hi,

I guess this is two questions:

I can't help but wonder if there is some type of fundamental psychological requirement needed in order for mathematics to "click" in order for someone to learn mathematics to begin with. I have a desire to learn mathematics, but I just can not seem to catch on to how mathematics equates on higher levels of complication.
I believe that once I learn mathematics to its fullest potential, I will be able to accomplish nearly anything scientifically, theoretically or universally. I envision being able to understand so much more of the world around me... if I could only understand math.
Can someone explain to me how I might begin to learn mathematics, when mathematics has never "clicked" for me and is it possible that it will "click" for me if I just keep on trying?
Is my rationalization of envisioning my understanding of the world in a more heightend way accurate with regard to understanding mathematics?

2007-11-08 10:30:24 · 4 answers · asked by Anonymous

2007-11-08 10:27:30 · 7 answers · asked by Anonymous

Add arithmetical symbols (add, subtract, multiply, divide) on the left of the equal sign, between the numbers, to make this equation true.
1) 123456789=100
2)7777= 105
3) 5555= 55
Thank you so much!!! I appreciate your time and help...

2007-11-08 10:15:34 · 7 answers · asked by **we create our own future** 3

2007-11-08 10:12:06 · 2 answers · asked by Goodloookin 2

2007-11-08 10:03:17 · 5 answers · asked by Anonymous

help please. hw assignment and i d k

2007-11-08 10:01:22 · 4 answers · asked by answersanonymous 3

x(t) = v1t + p1
y(t) = v2t + p2
z(t) = −1
2 gt2 + v3t + p3 ,
where the initial conditions are: p(0)  (p1, p2, p3) are the coordinates of the initial position of the
object; and p0(0)  (v1, v2, v3) are the coordinates of the initial velocity of the object. Thus given p(0)
and p0(0) the motion of the object p(t) is known for all time from the formula above.

Suppose the object is launched into space from the point (0, 0, 0) with initial velocity (1, 0, 1).
Where and when does the ball reach its highest point? Suppose your friend is standing at the
point (1, 0, 0) and has an object of his own that he wants to throw up into space to make contact
with your object. Find (v1, v2, v3) so that your friend’s object makes contact with your object
exactly when both objects are at their highest points. (Hint: why can you say v2 = 0?) Draw a
schematic picture of both curves.

2007-11-08 09:43:39 · 1 answers · asked by Mike A 2

for an equation like 2x^5-4x^4-4x^2+5=0??????
or any equation?
like how can u find wat they r and how many their r?

2007-11-08 09:36:27 · 1 answers · asked by [xo♥ox] 1

A group of six students all have different grades in stats. The median mark in the group is 68. If 2 of the 6 students are selected at random what is the probability they both have marks greater than 68?

Im stuck here. Im going over my notes trying to figure out how to do it. Any help, answers and explanations would be appreciated.

2007-11-08 09:22:05 · 7 answers · asked by Brandon 2

X (a random variable) has a double exponential distribution with parameter p>0 if its density is:

f_X(x) = 1/2 * e^(-p*|x|) for all x.

Prove that the variance of X = 2/(p^2).

I guess I'm having trouble performing the integration. If anyone could show how to do it step by step, it would be very helpful:

2007-11-08 08:44:05 · 1 answers · asked by cornzxo 1

x^x^x^...=2
asumming that this is possible.

(it means x to the x to the x to infinity equals 2)

i think x will have to include sq. rt. of 2 and infinity or something. However i know that it isnt sq. rt. of 2 to infinity power. I think...

plz show work. Thanks.

2007-11-08 08:42:39 · 4 answers · asked by ahhhh? 1

I'm researching albert einstein and i need to know this answer.

2007-11-08 08:32:59 · 3 answers · asked by AR2daHizzay 1

Then how do I use a geometric formula to evaluate the integral (a>0, r>0)?

2007-11-08 08:27:03 · 2 answers · asked by Anonymous

Show Work!
1. If x^2 + y^2 = 25, what is the value of d^2y/dx^2 at the point (4, 3)?

2. f(x) = ln|x^2-1|, then f' (x) = ?

2007-11-08 08:22:04 · 2 answers · asked by CG 1

Make x the subject of the formulae:
1.) a/b-x =c
2.) a=b(1-x)

2007-11-08 08:21:02 · 3 answers · asked by Anonymous

( 7Σk=1 of k)^2 - Σ of (k^3/4) ?

2007-11-08 08:18:48 · 2 answers · asked by Anonymous

We have the function f(x) = (2 x^2 - x +10)^sin(x). Use logarithmic differentiation to find f'(x).

f('1) =

I keep getting 10.32 as an answer, but apparently, it's wrong.

2007-11-08 08:13:48 · 6 answers · asked by sxysweet619 2

I have tried several times to find the value of a but cannot figure it out, here is the equation y=a(x-h)2+k the two is suppose to be "squared" but I could not find the little two, the numbers for the equation are 11.7=a(32.2-80)squared + 14

2007-11-08 08:07:11 · 2 answers · asked by Anonymous

can someone please show me how to get the "real zeros"??

2007-11-08 08:03:10 · 3 answers · asked by Anonymous

Angle AOB has a tangent of ________ and an angle measurement of ______ radians

2007-11-08 07:54:59 · 2 answers · asked by Anonymous

1/ rtsq b + rtsq c , 1/rtsq c +rtsq a, 1/ rtsq a + rtsq b
is an arithmetical progression.

2007-11-08 07:44:42 · 2 answers · asked by Crystal 3

2007-11-08 07:44:04 · 3 answers · asked by Shivers20 2

Hi, I'm thrown off by the natural log in this problem.

Determine the convergence or divergence of the sequence with the given nth term. If the sequence converges, find its limit.

sequence = ln n^1/2 divided by n

How do I go about solving this problem? It's an even problem, so I don't have an answer to work toward.

Thanks! :>)

2007-11-08 07:39:27 · 2 answers · asked by LLH 2

Hi - I need help with the following even question from my textbook:

A company buys a machine for $225,000 that depreciates at a rate of 30% per year. Find a formula for the value of the machine after n years. What is its value after 5 yrs.?

Any help would be appreciated. Thank-you!

2007-11-08 07:36:58 · 1 answers · asked by LLH 2

How should the arithmetic progression be, in order that sum of every 2 numbers (which are part of the progression) is part of the progression?
The same question about the geometric progression.

2007-11-08 07:34:08 · 1 answers · asked by Crystal 3

If y = 4x + 14, what is the value of y ÷ -4?

2007-11-08 07:31:52 · 4 answers · asked by Testhaha 1

) The surface area of a beach ball is 144 in2. Find the volume of air the beach ball will hold when fully inflated.



A)
16 in3

B)
144 in3

C)
288 in3

D)
36 in3





2) The actual length (L) of a rectangle is 27 centimeters. Use the scale drawing of the rectangle shown to find the actual width (W).



A)
18 cm

B)
40.5 cm

C)
9 cm

D)
15 cm





3) Find the sum of the measures of the interior angles in the figure.



A)
540 degrees

B)
900 degrees

C)
1260 degrees

D)
360 degrees





4) Which statement is true about Triangle ABD and Triangle CBD?



A)
There isn't enough information to determine if the triangles are congruent.

B)
The triangles cannot be proven congruent because nothing is known about the angles of the triangles.

C)
The triangles are congruent, proven by ASA.

D)
The triangles are congruent, proven by AAA.





5) A right triangle is removed from a rectangle as shown in the figure. Find the area of the remaining part of the rectangle. [Area of a triangle = 1/2(b)(h)]



A)
57 sq. inches

B)
57.5 sq. inches

C)
58.875 sq. inches

D)
60 sq. inches




6) Find the slope between the two points.

(6,10) and (4,-2)



A)


B)
6

C)


D)
-2





7)



A)


B)


C)


D)






8) Find the value of x.



A)
10

B)
70

C)
130

D)
50




9) If a triangle is acute, then all three angles have a measure of 60°.

Provide a counterexample to show that the statement is false.



A)
The three angles could be 30°, 30°, and 30°

B)
The three angles could be 30°, 60°, and 90°

C)
The three angles could be 30°, 70°, and 80°

D)
The three angles could be 30°, 30°, and 120°





10) Which pair of angles are congruent?



A)
1 and 8

B)
4 and 6

C)
5 and 6

D)
1 and 7





11) If two angles are supplementary, then they are adjacent.

Which diagram provides a counterexample for the statement above?



A)


B)


C)


D)






12) Jimmy ran 3 miles west from home and then turned north and jogged 4 miles. How far is Jimmy now from home?



A)
4 miles

B)
7 miles

C)
5 miles

D)
3.5 miles





13) Determine the longest side in DDEF.



A)
segment EF

B)
segment DE

C)
segment FE

D)
segment DF




14) What is the volume of a rectangular prism in which the height is 3mn2 and the area of the base is 7m2n?



A)
21m3n3

B)
10m3n

C)
21mn

D)
10m3n3





15) The diameter of your bicycle wheel is 25 inches. How far will you move in two turns of your wheel? Use 3.14 for .



A)
about 39 inches

B)
about 78 inches

C)
about 157 inches

D)
about 314 inches





16) The quadrilaterals shown are rectangles. Are they similar? If so, find the scale factor of the larger rectangle to the smaller rectangle.



A)
No

B)
Yes 2:3

C)
Yes 3:2

D)
Yes 4:3





17) In the diagram, line AB is parallel to line CD. Assume that b = 6x + 8 and g = 4x + 12. Find the value of x.



A)
2

B)
4

C)
10

D)
3





18) Choose the next figure in the geometric pattern.



A)
A

B)
B

C)
C

D)
D




19) Rectangle EFGH has the following coordinates:
E(-3,-1) F(-3,3) G(-1,3)

Find the coordinates of point H.



A)
(1,-1)

B)
(-1,1)

C)
(-1,-1)

D)
(-1,0)





20) If triangle MAS triangle TAR. Which of the following statements may not be true?



A)
segment MA segment TA

B)
segment MA segment SA

C)
MAS >TAR

D)
ASM ART





21) Are the lines perpendicular? If yes, determine the slopes of both lines.



A)
NO

B)
YES; 3,-3

C)
YES; 1,-1

D)
YES; 2, -1/2





22) What theorem or postulate proves that the triangles are congruent?



A)
SSS

B)
SAS

C)
ASA

D)
AAS





23) Find the volume of a cylinder with a radius of 3 cm and a height of 7 cm.



A)
21 cm3

B)
63 cm3

C)
126 cm3

D)
9 cm3

2007-11-08 07:19:45 · 8 answers · asked by Anonymous

a. 0.4074
b. 0.4394
c. 2.0369
d. 0.1769

Book is not helping me at all ....Please save me from my algebra disaster!

2007-11-08 07:18:43 · 9 answers · asked by Hollywood614 2

12d+7=5d+14 what is the value of d?

2007-11-08 07:18:14 · 9 answers · asked by Anonymous