Mathematics - 7 September 2007

A 2-digit number is one more than 6 times the sum of its digits. if the digits are reversed, the new number is 9 less than the original number. find the original number


i need an equation for this


thanks

2007-09-07 11:21:24 · 2 answers · asked by Xin Zhou 2

4(2x – 3) = 3x + 13

2007-09-07 11:14:23 · 12 answers · asked by Anonymous

evalluate the expression:
x^3+x^2+x when x= -3

simplify the expression:
3x-(4y-3x)-4y

and can you plz tell me when solving an inequality equations...why sometimes the symbol is reversed?

plz tell me

2007-09-07 11:10:21 · 3 answers · asked by Anonymous

thank you so mutch kk

2007-09-07 10:53:28 · 5 answers · asked by kimberly k 1

A group of students decides to sell pizzas to help raise money for their senior class trip. They sold pepperoni for $12, sausage for $10, and cheese for $8. At the end of their sales the class sold a total of 600 pizzas and made $5900. The students sold 175 more cheese pizzas than sausage pizzas. Set up a system of three equations and three unknowns, use an augmented matrix to solve, and show all work to receive full credit.

A. What are the three unknowns?

B. Write a separate equation representing each of the first three sentences.

C. Determine the augmented matrix that represents the three equations.

D. Solve for the matrix. Show all work.


E. How many of each type of pizza were sold?

2007-09-07 10:48:05 · 2 answers · asked by Anonymous

2007-09-07 10:44:00 · 2 answers · asked by b 1

2007-09-07 10:35:45 · 5 answers · asked by ahn 1

In complete sentences, and paragraph form.
..Explain in words how to evaluate the expression
5[(6+3then a power 2) -14 / 7]
according to the order of operations.
Helppp.
and the power thing..which is 3 times 3
i just couldnt write a small 2 right by the 3

2007-09-07 10:31:43 · 4 answers · asked by ? 3

UMM. i NEED help ummm help me find three different ways to do 729 AND 15,625 in a POWER!!!!!

2007-09-07 10:23:34 · 6 answers · asked by Anonymous

15= 3 (7y - 2)

5/8x - 1/2 = 3/4


help please..

2007-09-07 10:21:58 · 7 answers · asked by rose v 2

Help, please.

2007-09-07 10:21:38 · 4 answers · asked by Anonymous

will be $5 every day payable each morning. Then he gave the boy his first $5 bill.

Billy (who was broke before that) immediately decided that tonight he will buy ice cream to his girlfriend and himself (2 x $1.25 = $2.50), and continue to do so every day, until he has $15 to take her to the movies (2 x $7.50) instead.

On what day will they go to the movies?

2007-09-07 10:20:24 · 7 answers · asked by Alexander 6

2007-09-07 10:13:12 · 6 answers · asked by Marvin 4

2007-09-07 10:05:47 · 5 answers · asked by brainless 2

2007-09-07 10:05:04 · 4 answers · asked by brainless 2

2007-09-07 10:03:06 · 6 answers · asked by brainless 2

Prove that a polynomial of degree <= 2 under addition is an isomorphism with vector addition in R3:

I don't want the answer, but hints to help me would be GREATLY appreciated. Thanks

2007-09-07 10:00:29 · 3 answers · asked by Galbadian 2

How do you divide monomials by monomials
with exponents?


e.g>>

2a^4b^3÷a^2b


-4w^3x^5 ÷ (-2w^2x^2)


-9f^3g^5h^2 ÷ 6fg^2h

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oh and multiplying monomials by monomials?

is the answer to this rite ?
(2yz)(-3y^3)
= -6y^4z
if its not rite can you explain what i did wrong?

2007-09-07 09:56:17 · 1 answers · asked by Anonymous

Can anyone pleeze give me all the square roots from 1 to at least 1000??? or give me a link to go to???
it would rele help me a lot?

2007-09-07 09:52:08 · 2 answers · asked by Anonymous

How do you know if a quadratic equation will have one, two, or
no solutions?
How do you find a quadratic equation if you are only given the solution?
Is it possible to have different quadratic equations with the same solution?

2007-09-07 09:50:53 · 4 answers · asked by Anonymous

does probability really work out in real life? of course, in a lottery or rolling dice, if you havent rolled a 6, just because your rolled a 1,2,3,4, and 5 on the last 5 tries doesnt make it any more likely to get a 6 on the 6th try since its random supposedly. so how can we really apply this to actual life scenarios,

for instance the probability of the next terrorist attack. now we have a good idea that one is inevitable, but of course that could be wrong, we might never experience another for the rest of our lives, then again thats not really a good bet... but we havent really seen anything since 9/11/01, so with every passing day doesnt the likelihood of a new terrorist attack become more likely? is this even applicable to probability considering the differnt factors at work (ie terrorist fundraising, planning, training, foiled plans by the authorities) that take time and would explain why we havent been unfortunate enough to witness another attack? can someone explain?

2007-09-07 09:48:35 · 11 answers · asked by ? 2

2007-09-07 09:47:38 · 9 answers · asked by Anonymous

2007-09-07 09:37:23 · 14 answers · asked by ArmyWife 2

if you know that sin x = ±1/√2 how do you find out what x is?

2007-09-07 09:19:24 · 4 answers · asked by fhsdjfsd 2

2007-09-07 09:18:39 · 8 answers · asked by Slim24/7 5

2007-09-07 09:12:03 · 4 answers · asked by Warfighter 2

A 1/4 -mile track for racing stock cars consists
of two semicircles connected by parallel straightaways (see
the figure). In order to provide sufficient room for pit crews,
emergency vehicles, and spectator parking, the track must enclose an area of 100,000 square feet. Find the length of the
straightaways and the diameter of the semicircles to the nearest foot. Recall: The area A and circumference C of a circle of diameter d are given by A= pie times diameter squared divided by 4 and c= pie times diameter.


i do not know how to get it into an equation although i have been shown some suggestions and even once into the equation i do no know how to solve... can someone please fully help me...

i do not know how to work problems with the substitution method, if someone would be so kind to work it out maybe i can see and learn... I am a visual learner

here is the diagram
http://i7.photobucket.com/albums/y294/joetta/cart.jpg

2007-09-07 08:59:10 · 2 answers · asked by joetterb 3

i have 2 problems and both of them is function which i am not good in so i need your help and plzzz write every step of how to do and how we get the right answer.
question nr. 1: given f(x)= 4x^2/(2+3x^2)
determine the domain of f(x).
determine the signs of f(x).
determine the asymptotes, if any.
Draw the graph for f(x).

question nr.2: given f(x)=x^2-x-2/ x-1
determine the domain of f(x).
determine the signs of f(x).
determine the asymptotes, if any.
draw the graph for f(x).

please help me and if you want to have my email so i can write my email to you guys so you can send me because i dont have the programe for math which is called ( mathcad) so i can not draw any graph. please help me i really need help.
plz write your answers step by step how to find out and how to draw the graph.
thank you

2007-09-07 08:50:46 · 2 answers · asked by nice_ girl 1

How much of a 30% alcohol solution must be mixed with 8 liters of a 45% solution in order to get a mixture which is 42% alcohol. PLEASE explain, i don't know how to solve it.

2007-09-07 08:48:07 · 3 answers · asked by Anonymous

2007-09-07 08:37:40 · 4 answers · asked by Anonymous