Mathematics - 3 November 2007

1. 8
2. 4
3. –4
4. –8

b. Solve 6y = 12 – 6y

1. 0
2. 1
3. –1
4. all real numbers

c. Solve 7(2 – m) = 3m

1. Option A: -7/5
2. Option B:–1
3. Option C: 1
4. Option D: 7/5

2007-11-03 11:52:08 · 15 answers · asked by fmlp 1

a) y = sin X tan X
b) y = sin^3 x + sec x
c) y = cos (x^2 + x + 2)
d) y = sex (1/squareroot x)

Please explain to me how I could approach this? I've read my text book and it is not helpful at all.

Also, could you possibly explain

e) Find the equation of the tangent line to the graph of y = sec(3x) at the point with x = pie/12

Thank you.

2007-11-03 11:49:57 · 2 answers · asked by Anonymous

How many solutions (a, b, c, d) are there to the equation
a+b+c+d=2007 where a, b, c, d are positive integers?
plz show work. thz.

2007-11-03 11:43:06 · 4 answers · asked by Anonymous

What comes next in these number sentences

1,2,4,7,12,19,_,_,_
1,3,7,13,21,_,_,_
1,43,2,41,3,39,4,37,_,_,_
2,4,9,16,25,_,_,_
11.22,66,264,1320_,_,_
3,5,6,10,9,15,12,_,_,_

2007-11-03 11:35:44 · 8 answers · asked by psichosis34 1

Express your answer in simplified radical form
(square root of 108)
____
V108

2007-11-03 11:35:15 · 8 answers · asked by meme 1

2007-11-03 11:32:09 · 2 answers · asked by Jenny D 1

has to be written in this form......(x l -4 <= x <= 6)

2007-11-03 11:24:10 · 5 answers · asked by ehrlich 6

assume that adults have IQ scores that are normally distributed with a mean of 100 and a standard deviation of 15(as on the wechsler test)(draw a graph)
finad the probability that a randomly selected adult has an IQ greater than 131.5(the requierment for membership in the Mensa organization)

2007-11-03 11:19:23 · 2 answers · asked by xssgx911 1

Solve the absolute value equation |2x - 3| = |x + 2| using your graphing calculator. Enter both x-values to the nearest hundredth.

The smaller x value is
The larger x value is

2007-11-03 11:19:19 · 2 answers · asked by Anonymous

2007-11-03 11:06:47 · 6 answers · asked by Anonymous

here is my problem, and I have tried to figure it out but i cant. The furthest i got was trying the sum of squares which didn't work out because I had a cubed left and the answer didn't fit into what they asked. So,

The transformation x=z - b/3a converts the cubic equation ax^3 + bx^2 + cx + d=0 into one of the form z^3 + 3Hz + G=0. Find H and G in terms of a, b, c, d (Someone help this is driving me crazy!!!)

2007-11-03 10:58:23 · 2 answers · asked by busy bee 2

How is it possible to do this?

The total electric current in the wire leading to a group of 2 resistors in parallel connection is given by the formula: IT = (V/R1) + (V/R2) where IT = total electrical current, V = potential difference, and R1 and R2 are two resistances.

IT = 420/3x

V = 120

R1 = 15

R2 = 2x - 4

Find the values of IT.

The smaller value of IT is ____
The larger value of IT is ____

2007-11-03 10:57:17 · 2 answers · asked by Anonymous

i have no basic maths and when it comes to p-values i get a bit confused about what figures are greater than 0.005 and less than 0.005, could someone give me some examples of these and please refrain from any rude comments thanks

2007-11-03 10:55:07 · 2 answers · asked by minky k 1

1) A pile of 10 000 sheets of the paper used in a book is one metre high. Work out the thickness of one sheet of paper in metres, writing your answer in standard form.



2) If the number 3.52 times 10^-7 is written out in full, how many zeros follow the 2 ???

3) If the number 6.2 times 10^-7 is written out in full, how many zeros would there between the decimal point and the 6?

4) Write in order of size, smallest first:

p= 5 times 10^5
q= 6 times 10^4
r= 8 times 10^-6
s= 25 000

5) Which of the following has the largest volume if
x= 2 times 10^4
and y= 2 times 10^-2

a) xy

b) x^2 (x squared)

c) x/y (x over y)

d) 1/y^3 (1 over y cubed)

???

2007-11-03 10:47:07 · 6 answers · asked by Anonymous

2007-11-03 10:43:13 · 7 answers · asked by John 4

every year the Uk government spends almost 200 thousand million pounds on schools. Write this number in standard form.



Please explain to me how to do it and the answer. thanks

and how to you write 200 thousand million ??

2007-11-03 10:34:58 · 10 answers · asked by Anonymous

B= 39.3 degrees, C= 4.3 mm

2007-11-03 10:27:39 · 4 answers · asked by Cary C 6

What is the Pythagoras switch and does this have anything to do with it? http://youtube.com/watch?v=cWpgJJnUEvo

2007-11-03 10:18:22 · 1 answers · asked by John 4

-x^2+3x+5x=-6+5x

THis has to =0 but taking the 5x from the right to the left side makes the x terms=0. How is this question done I am unsure how to approach this.

2007-11-03 10:16:10 · 7 answers · asked by Anonymous

Tan X -= 0.67


Not X is a symbol of 0 with a line thru the middle.

2007-11-03 10:11:30 · 2 answers · asked by Cary C 6

At noon, ship A is 20 nautical miles due west of ship B. Ship A is sailing west at 20 knots and ship B is sailing north at 25 knots. How fast (in knots) is the distance between the ships changing at 7 PM? (Note: 1 knot is a speed of 1 nautical mile per hour).

2007-11-03 09:55:59 · 2 answers · asked by alawrence108 1

So in my school the semester grade is as follows.

40% cardmarking 1
40% carmarking 2
20% Final Exam So i need to know the formula to see what grade I have to get on my final to get a certain grade in the class

2007-11-03 09:43:43 · 6 answers · asked by Anonymous

my daughter has a math problem that neither of us can figure out! if anyone can just give us some pointers as to how to get the answer, that would be great!!

one side of an equilateral triangle increased by 13 is 31 less than three times the other side. if the sides are measured in inches, what are the measures of the three sides of the triangle?

again, thanks!

2007-11-03 09:43:26 · 8 answers · asked by amanda 2

A population has a mean of 200 and a standard deviation of 50. A simple random sample of size 100 will be taken and the sample mean x ̅ will be used to estimate the population mean.

Show the sampling distribution of x ̅.

How do I show whether the sampling distributing of the sample mean is normal or not normal?!?

2007-11-03 09:34:17 · 2 answers · asked by Anonymous

The circumference of a sphere was measured to be 70 cm with a possible error of 0.9 cm. Use differentials to estimate the maximum error in the calculated surface area. _____?

Estimate the relative error in the calculated surface area. ______?


Hint: The circumference of a sphere of radius r is C = 2 \pi r, and its surface area is A = (4pi)(r^2). Eliminate r first!

2007-11-03 09:26:34 · 3 answers · asked by Anonymous

2007-11-03 09:25:44 · 5 answers · asked by plasticbag 2

I thought f-inverse didn't exist if f wasn't 1-1 but my homework doesn't think so. Any thoughts?

2007-11-03 09:17:23 · 2 answers · asked by UMRmathmajor 3

The volume flow rate in an artery supplying the brain is 3.00 10-6 m3/s.

(a) If the radius of the artery is 4.90 10-3 m, determine the average blood speed.

(b) Find the average blood speed at a constriction in the artery if the constriction reduces the radius by a factor of 3. Assume that the volume flow rate is the same as that in part (a).

2007-11-03 09:06:08 · 1 answers · asked by Unkown 2

*6*
**5
------
* 8*0
6 * * 60
3* * * 0 0
----------------
3 * 9 * * *

2007-11-03 09:04:25 · 1 answers · asked by Anonymous

Let f be the function defined by y = f(x)= 4 x^2

1) Find the actual change in y when x changes from 2 to 2.1

2)Use the differential dy of the function f to find the APPROXIMATE change in y when x changes from 2 to 2.1

* i don't need work, just the answer for 1 and 2 is fine

2007-11-03 08:45:28 · 2 answers · asked by diecast 3