Mathematics - 21 September 2007

express each of the following as (x+a)² + c²

questions one;
x²+2x+3,
this is what i got
(x+1)² + 2

now what i'm confused about is should it be 2 or 2²


(note 2^2 = 2², short cut for squared is alt+253 (you type the numbers on the num pad - please pass this on)

2007-09-21 23:54:32 · 2 answers · asked by wonderboy 2

please can you help me as it is for my daughters homework which is needs handing in on monday!!!!!!!

2007-09-21 22:58:13 · 9 answers · asked by Beth 1

2y-3(5y-8)=2(5+y)-10
2y-15y+24=10+2y-10
-13y+24=2y

im stuck after this, can someone help me out

in seems that i got this but im not sure if this right
24=15y

2007-09-21 22:17:49 · 12 answers · asked by cjay_cjay 2

Hello, I've been taking algebra1 and its sorta hard since im not a math person. Can you help me by answering these equations and please show your work!

x+(x+1)+(x+2)=9

(y-2)+(y-1)+y= -3

19n-11-12n-5=5

7h-17-6+4h=17

-2t+3(2+t) = -10

2(x+3)-6x-4 = 8

4z+2(z+7)= -14

-5(1+w)+4w= 8

-3(2-y)+2y= 7

5a-(1-a)+4 = 9

-7 - (-3 - 2g) - 10 =0

1.5k - (k +2.4) = 17.4

3s - (0.5s+7.2) = 32.8

*Remember: Show your work!

2007-09-21 22:06:11 · 8 answers · asked by infamous_l00z3r 2

How do you solve the equation: x+(x+1)+(x+2)=9
Please show your work.
all the people I've asked to solve this equation, they were either too dumb or too busy to answer. How lame are they?

2007-09-21 21:55:48 · 14 answers · asked by infamous_l00z3r 2

4x+5(3+2x)=3
4x-15-10x=3
-6x -15 =3
-6x = 18
x = 3

Did I do this correctly, if i didnt tell me where I made my mistake?

2007-09-21 21:37:31 · 19 answers · asked by cjay_cjay 2

9x(3-2x)=10(9x+4)

expand into two brackets and solve x, (both of them)

2007-09-21 21:32:39 · 5 answers · asked by wonderboy 2

multiply:

(5√(6)-15√(7)) ((4√(6)+12√(7))=




use rational expressions to write (x^1/3)( y^1/6)(z^1/9) as a single rational expression.



simplify by factoring.
√(80a^2b)


rewrite the following expression with positive exponents.
(5xy)^-8/9

2007-09-21 21:30:16 · 4 answers · asked by kitty c 1

I need a formula that says:

For every 10mph over 55 mph, (miles per hour) your mpg (miles per gallon) decreases by 10%

Lets say you got 19 mpg at 55 mph, what would you get at 75 mph? I am having a very hard time trying to figure this one out.

Thanks in advance!

2007-09-21 21:26:04 · 5 answers · asked by Greg L 1

How do you solve this equation: 18k-6k-14k=6

Please show your work. If you answer this, you are considered "smart" cause all the people i ask to solve this equation is too dumb.

2007-09-21 21:12:52 · 10 answers · asked by infamous_l00z3r 2

i really need this one.....

2007-09-21 21:07:29 · 3 answers · asked by intifada 1

2007-09-21 20:24:51 · 6 answers · asked by Anonymous

2007-09-21 20:19:18 · 5 answers · asked by Anonymous

2007-09-21 20:15:52 · 4 answers · asked by HC 2

I have applied for college and I have to take an enterance test which includes math.

I am SOOOO bad at math and I mean REALLY bad at math. I am sort of lucky I can add and subtract.

I want to ask, what is the best way for me to study.? I have just a few weeks to get ready. I am not worried about any other part of the test, just the math part.

2007-09-21 20:04:17 · 7 answers · asked by LadyCatherine 7

How do I find the sqrt(i)?
I know the answer, but I need the workings.
Thanks

2007-09-21 19:53:33 · 8 answers · asked by Jeremy 2

pls show me the solutions.. tnx
Pls. help me solve dis..

1. The sum of a number and its reciprocal is 10/3. find the number.

2. A rectangle 25cm by 50cm is increased on all sides by the same amount. Its area increases 400 sq. m. By how much is each dimension increased?

3. At a conclusion of a committee meeting, a total of 28 handshakes were exchanged. Assuming each person was equally polite toward all the others, how many people were present?

4. Two trains left the same station at the same time. One was travelling due north at a speed that was 10kph than faster the other train, which was travelling due east. After one hour, the trains were 71 km apart. How fast, to the nearest km per hour, was each train travelling?

5. The base of a triangle is 4cm shorter than the altitude, and the area of a triangle is 126cm^2. Find the length of the base and the altitude.

pls. show me the solutions... tnx and godbless

2007-09-21 19:50:54 · 3 answers · asked by Anonymous

2007-09-21 19:44:18 · 2 answers · asked by Adeel 2

does anyone know good sites for high school maths function explanation and formulas? thx

2007-09-21 19:34:56 · 1 answers · asked by wonder why 2

if y=x+16+x^2
how would you represent y^2

2007-09-21 19:31:34 · 9 answers · asked by Anonymous

lim x -> -9 from the left

f(x) = absolute value ( 9x^2-87x +54)/(6x^2-52x-18)


factoring is difficult ...HELP

It has to be a FRACTION so I can't just use a calculator

2007-09-21 19:23:31 · 1 answers · asked by Anonymous

If 200 feet are required to stop a car traveling 60 miles oer hour, how many feet are required to stop a car traveling 100 miles per hour? Round to the nearest foot.

2007-09-21 19:23:20 · 5 answers · asked by sgregory0020@verizon.net 1

Television sets. What does it mean to refer to a 20 inch t.v. set or a 25 inch tv set? such units refer to the diagonal of the screen. A 25 inch t.v. set also has a with of 20 inches. Whats the height? What is the height of a 25 inch t.v.?


If a pro basketball player has a verticle leap of about 20 inches, what is his hang time? Use the hang time fraction v=48T^2
his hang time is? seconds.


solve.
(x+6)(x-9)(x+3)>0
the solution set is{xI }

2007-09-21 19:10:49 · 5 answers · asked by kitty c 1

pls. help.pls show me the solutions.. tnx
Pls. help me solve dis..


1. Find the length of the side of an equilateral triangle whose altitude is 3cm shorter than a side.

2. An airplane flies 900 km against a head wind of 25kph. The plane took 15 minutes longer for this flight than with a tail wind of 25kph. How fast could the plane fly in still air?

3.Fifty-four cans are packed in some boxes so that the number of boxes is more than the number of cans in each box. Find the number of boxes used.

4. Dean and Len can type a manuscript together in 3 and 3/5 hours. Dean, working alone can type the manuscript 3 hours longer than Len. How long would it take each to type the manuscript alone?

5. A mango grove has 20 trees per acre, and the average yoeld is 300 mangoes per tree. For each additional tree per acre, the average yield will be reduced by 10 mangoes per tree. How many trees per acre will yield the maximum number of mangoes per acre, and what is the maximum number of mangoes per acre?

2007-09-21 18:43:54 · 2 answers · asked by Anonymous

2007-09-21 18:42:26 · 1 answers · asked by Newton 1

chain rule

2007-09-21 18:37:29 · 3 answers · asked by lana 1

A=4000(2.7183)^.07(8)

2007-09-21 18:35:54 · 2 answers · asked by darrington2001 1

Ok this is a question that i cannot figure out. Say there are 3 doors and a prize behind 1 of the doors and u get to choose any of the 3 doors. lets say u choose door 1, your odds are 1/3 so 33% of getting it right. but what if i open up door 2 and show u there is nothing behind it, then i give u the option of switching your original choice (1) to door 3. Mathematically this would not make your odds 50% but 66% to get it right. Is this correct?

The best way i can explain it is this. Say there are 1 million doors and i say to choose any door in between. you choose door 100. i then open ever door to show it's empty except door 100 and door 257,652. now are your odds still 50% between the 2 doors? do you really think you picked the right door on the very first try. I believe your odds of switching doors if given the option would go up somewhere around 99.9% in this case. Can anyone back me up on this or better explain if im right or wrong, preferably in case 1 with the 3 doors. thanks!

2007-09-21 18:32:48 · 4 answers · asked by wade 2

One number is smaller than a second number. The sum of the squares of these numbers is 28 more than the product of the two numbers. Let x be the bigger number.
a. How will you represent the smaller number?
b. Represent the square of each number in terms of x.
c. Write the sum of the squares of the two numbers in terms of x.
d. Represent also the product of the two numbers in terms of x.
e. Write the equation and solve for x.
f. What is the bigger number?
g. What is the smaller number?

tnx..

2007-09-21 18:26:57 · 2 answers · asked by xah8 1

2007-09-21 18:14:27 · 3 answers · asked by Rob 1