1. H

    arithmetic sequence

    Question (given): A pharmacy sees that its sales of cold medications increase steadily from the beginning of May. Their sales record shows that last year they sold 26 packets of cold tablets in the first week in May. The sale of cold tablets increased by seven packets each week. 1. on the...
  2. R

    Generalization of Riemann-weil formula for arithmetic functions

    \sum_{n=1}^{\infty} \frac{\mu(n)}{\sqrt{n}}g(\log n)=\sum_{\gamma}\frac{h( \gamma)}{\zeta '( \rho )}+\sum_{n=1}^{\infty} \frac{1}{\zeta ' (-2n)} \int_{-\infty}^{\infty}dxg(x)e^{-(2n+1/2)x} </math> \sum_{n=1}^{\infty} \frac{\lambda(n)}{\sqrt{n}}g(\log n) = \sum_{\gamma}\frac{h( \gamma)\zeta(2...
  3. E

    Tutoring Arithmetic With Negative Numbers

    I'm tutoring a girl who is going into seventh grade, but her is way below that. I haven't seen what she was taught and what her grades were. I asked her what's she's doing in summer. She's said she's in school for Math and ELA (English Language Arts). When I asked if she had any notes or...
  4. B

    Find the percentage?

    The new price is \$50. It got reduced by 30% to get to \$50. What is the original price? I just can't get my head around this. Can anyone give me a hand please? Thanks.
  5. E

    Balance of arithmetic operations «Ghayna and Ayna»

    Hello! Balance of arithmetic operations «Ghayna and Ayna».pdf
  6. B

    what is the cost of each sandwich?

    25 ham barbecue sandwiches and 12 drinks cost \$83.75. 50 ham barbecue sandwiches and 27 drinks cost \$171.25. What is the cost of each sandwich?
  7. B

    The total value of withdraws made during Day?

    I don't know what to do for question (ii). Help me, please, I'm lost. I don't know where to begin. I have an exam tomorrow on this topic, so I require a bit of help because I had been sick a lot. I missed a lot of school, so I missed the topic. Thanks for answering the question. For part (i), I...
  8. B

    What percentage should be removed?

    The coat was \$20 it dropped down to \$15 by have much% did it reduce? We did this problem when we were doing percentages, and I can't still figure out the answer. Can someone give me a hand please. Thanks.
  9. B

    Solve for x

    What is 5x=25 Help me please. 3x=15 Solve for x please. Thanks in advance. x=15 Thanks. In class, we started doing expressions like this: 3x=15 I don't really understand it. Can someone give me a hand please? I don't have an idea where to start. Thanks to anyone who will reply.
  10. A

    Reverse Arithmetic progression series computer program.

    Reference : Can we write a computer program which will print the Reverse Arithmetic progression number...
  11. H

    Arithmetic sequence

    I need a profession ready to teach and make you understand to solve this. Mr Smith starts a job with an annual salary of \$6400 which increases by \$240 every year. After working for 8 years, Mr Smith is promoted to a new post with an annual salary of \$9500 which increases by \$360 every year...
  12. C

    Five numbers in arithmetic series

    The sum of five numbers in arithmetic progression is 40 and the sum of their squares is 410. Find the five numbers. Thanks beforehand for showing the way to solution
  13. Monox D. I-Fly

    [ASK] Fraction Addition with Arithmetic Series as Denominators

    Does anyone know how to add these fractions? \frac11+\frac1{1+2}+\frac1{1+2+3}+…+\frac1{1+2+3+…+2009} Like my previous question, I believe this one also has something which can be canceled out, and the denominators contain arithmetic series. Can this series be used to make some sorts of...
  14. B

    Arithmetic mean

    Hey there, I've got a really tricky one here and any clue would be very much appreciated: Which is the greatest natural number which has the following characteristic: Ignoring the first and the last digit of this number, any other digit must be smaller than the arithmetic mean of the previous...
  15. Z

    Using Eigen Values and Vectors for computing complex arithmetic series

    The Fibonacci sequence is 0, 1, 1, 2, 3, 5, 8, 13, .... In general, F_{k+2} = F_{k+1} + F_{k} . Here is some background info, we derive the following matrix for computing F_{100} : \mathbf{A} = \begin{bmatrix} 1 & 1 \\ 1 & 0 \end{bmatrix} \begin{bmatrix} F_{k+2} \\...
  16. A

    Modular Arithmetic proof

    Hi, I have encountered some difficulties with the question in the zip file attached. Greatly appreciate any help given! Thanks in advance.
  17. C

    Line Segment Arithmetic

    Line Segment Arithmetic Let all numbers be assigned an arbitrary collection of line segments equivalent in number to the number the line segments are assigned to: q = (q,q_) Let zero be assigned one arbitrary line segment. (0,_) 0 = (0,_) 1= (1,_) 2= (2,_,_) 3= (3,_,_,_) Let multiplication...
  18. H

    Some problems in elementary arithmetic functions

    Hello, I ran in to this problem and I cant seem to show this although it seems intuitively correct: Given any positive integer $n>1$, prove that there are infinitely many integers $x$ satisfying $d(x)=n$. Where $d(n)$ is the number of positive divisors of $n$. I will appreciate the help.
  19. I

    100% Free Math Help Videos (Arithmetic and Algebra)

    Free Maths Video Help Hi, I make free online videos for CXC topics. Its 100% feel free to visit the site. You don't even have to register. We post new videos every week. The site will take you to the videos that are hosted on youtube. Soon I have full videos on Trigonometry, Matrices...
  20. N

    Word problem with arithmetic sequence

    Hello, I'm just trying to solve one problem probably arithmetic succession. Somehow I do not know where to start, counting examples from the Hudet collection and Peták does not do my problem, the arithmetical sequence is a fairly light topic, but here I do not know where and how. Do you advise...