Mathematics - 4 October 2007

1. If x + 4= -2, the numerical value of -3x - 2 is A. -20 B. 16 C. 4 D. -8

2. If a= -2 and b= 5, what is the value of b - 13/a? A. -4 B. -9 C. 9 D. 4

3. What is 8* 10 to the -2 power in standard notation? A. 0.008 B. 0.08 C. 0.8 D. 800

2007-10-04 09:42:05 · 12 answers · asked by Amber 2

2007-10-04 09:41:53 · 2 answers · asked by rjh12 1

(6x^3 – 11x^2 + 11x – 2) ¸ (2x – 3)

2007-10-04 09:40:55 · 1 answers · asked by Anonymous

I got a question X(squared) +5X +2 =0 I need to complete the square or somthing can someone help me

2007-10-04 09:39:42 · 6 answers · asked by Trunk Monkeey 3

(x + 3)(x2 – 3x + 2)

2007-10-04 09:39:28 · 1 answers · asked by Anonymous

ok before I didn't do FOIL, so now I've done it but I'm still stuck:
x^2 + y^2 = 10
x + 2y = 7

x^2 + y^2 = 10
2y = 7-x
y = 7/2 - x/2
x^2 + (7/2 - x/2)^2 = 10
x^2 + 49/4 - 7x/4 - 7x/4 - x^2/4 = 10
x^2 + 49/4 - 14x/4 - x^2/4 = 10
4x^2 + 49 -14x -x^2 = 40
3x^2 -14x+49 = 40

......so where do I go from here to find x....or have I done something wrong again?

2007-10-04 09:38:39 · 7 answers · asked by Anonymous

im really bad with word problems, so i have no clue how to figure out an equation for this problem.

heres the problem.
Megan bought four times as many pencils as erasers. pencils cost $.04 each, and erasers cost $.19 each. If megan spent $2.10 in all, how many pencils did she buy?

this is what i have so far as my equation.

2.10= 4(.04x)+ .19.........

i dont know what comes after the .19

2007-10-04 09:34:58 · 5 answers · asked by =) 3

Write 5 digits in a line all are different none are nine three are odd not so the others each alternates with its brothers twice the first gives you the fourth first plus second equals the third before you write them down too fast third plus fourth gives you the last

2007-10-04 09:26:28 · 3 answers · asked by nisam89 1

the numbers never end.

2007-10-04 09:18:10 · 4 answers · asked by Osato I 1

Does a square have 2 parallel sides or 4 parallel sides ?

2007-10-04 09:17:40 · 31 answers · asked by holly_cat_uk 1

with procedures plz

2007-10-04 09:14:16 · 3 answers · asked by aoc10010001100 2

If this is true how would I factor it? Would it still be the rule of the first row multiplying the first column etc?

2007-10-04 09:02:26 · 4 answers · asked by thatsme:) 1

2007-10-04 09:00:25 · 11 answers · asked by Taylor C 1

1. 23.31
2. 4
3. 0.05
4. 18
5. 85
6. 25
7. 190

2007-10-04 08:58:43 · 2 answers · asked by Anonymous

2007-10-04 08:52:59 · 9 answers · asked by asparagus80 1

2007-10-04 08:50:25 · 5 answers · asked by Ivonne G 1

how would you solve that?

2007-10-04 08:48:09 · 5 answers · asked by Anonymous

A plane on a search mission flew east from an airport, turned and flew west back to the airport. The plane cruised at 200km/h when flying east and 300km/h when flying west. If the plane was in the air for 6 hours, how far from the airport did it travel?

2007-10-04 08:43:31 · 3 answers · asked by jayjay 2

so this is a prime example of what i don't know how to do....

y=1/(1+e^(1/x))

how can i tell what the discontinuities are without using a graphing calculator?

2007-10-04 08:39:39 · 4 answers · asked by Brews 2

A personal stereo costs £44.50 + VAT. If the rate of VAT is 17 and a half %, Calculate the total cost of the stereo.

2007-10-04 08:36:26 · 5 answers · asked by codysmithxo 1

what is sin(2arcsin(3/5))?

i know that without the 2 it would simply be 3/5 but i can't find any examples with a co-efficient in front of the arcsin

2007-10-04 08:35:03 · 2 answers · asked by wiczyman 5

The equations of two planes p1 and p2 are 3x + 4y = 7 and 2x - y + 2z = 1. Find
(i) the distances from the origin and from the point A(4,-3,0) to the plane p1.
(ii) the Cartesian equations of the set of points whose distances from the plane p1 are equal to the distance of the point A from the plane p1.
(iii) a vector equation of the line of intersection of the planes p1 and p2.

2007-10-04 08:13:06 · 2 answers · asked by plolol 2

y = x ²

2x-4y= -12

Could you provide workings as well, but please put your answer first so I can attempt it reach this answer.

With trial and error I found that:
x = 2
y= 4

However, I would like a method because I cannot continue doing trial and error - unless that's the method =?

2007-10-04 08:12:03 · 5 answers · asked by ??? 2

Math question on the study guide I can't get for the life of me:

9] The height of an incomplete pass thrown by W. Paddock can be modeled by (3 pts each)
y(x) = -0.024x2 + 1.39x + 6
where y(x) is the height of the ball x feet from the W. Paddock.

(a) At how many feet from W. Paddock does the ball hit the maximum height?
(Round to the nearest foot)

(b) What is the maximum height that the ball reaches?
(Round to the nearest foot)

(c) How far is the point at which the ball hits the ground from the W. Paddock?
(Round to the nearest foot)

Thanks for any help.

2007-10-04 08:07:43 · 4 answers · asked by Ghost 1

Jimmie is building a sandbox that is 12 times as wide as it is deep, and 1m longer than it is wide. It holds 3m^3 of sand when full. The wood cost $24/m^2. How much will the wood cost Jimmie? (btw, there is no top or bottom, just the sides when calculating for the area!!) (that the question...now i got the answer $84....is that right??? if so, can someone confirm that? if not , how would you get the correct answer....) ?? thanks!!

2007-10-04 08:01:31 · 3 answers · asked by Anonymous

10 points to whoever help me the most (and no i'm not cheating i'm asking for help/an explanation on how to work it out).


x(3x-2y)+y(3x-4y)

2007-10-04 07:58:04 · 8 answers · asked by Alicia ... 2

If f(x)=4tanx/x

Find f'(x)

2007-10-04 07:41:03 · 5 answers · asked by Rachel 1

The y-intercept of the parabola described by y = 2(x - 5)2 + 6 is?

2007-10-04 07:23:30 · 3 answers · asked by Anonymous

A quadratic function passes through the point (3, -28) and has a vertex at (6, -64). Write the function in the form y = a(x - p)2 + q. What are the values of a, p and q?

2007-10-04 07:19:05 · 4 answers · asked by Anonymous

2007-10-04 07:03:55 · 3 answers · asked by RogerDodger 1