math problem

posted by .

- Mr. Hermann, a stamp collector , sold 2 stamps for $5000 each. Based on his cost , he made a 25% profit on one stamp and lost 20% on the other stamp. What was Mr. Hermann's total loss on the two transactions?

- There are five chidren in the Roberts family. Amy and Ariel are twins. Brett and Bart are also twins. Amy's age plus Brett's age is 25years. Ariel's age plus Charlene's age is 27 years . Bart's age plus Charlene's age is 20 years. What is the sum of the ages of all 5 children in the Roberts fanily?

  • math problem -

    return = 5000(1.25) + 5000(.8)
    = ...


    let Amy and Ariel' age be x
    let Brett and Bart's age be y
    let Charlene's age be z

    x+y = 25
    x + z = 27
    y+z = 20

    2nd minus the third
    x - y = 7

    add that to the first
    2x = 32

    in the 1st:
    16+y = 27
    y = 11

    in the third:
    11+z = 20
    z = 9

    so we have 2x + 2y + z
    = 32+22+9 = 63

  • math problem -

    Amy and Ariel are 13 + 13=26.Brett and Bart are 12+12=23.Charlene is 24

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. social studies (civics)

    hi... i have to do a project and its about drawing a stamp for any of the amendments... i want to do a stamp on freedom of SPEECH..and i don't know what to do for it... i need suggestions..please...
  2. algebra

    Allen bought 20 stamps at the post office in 37 cents and 20 cents. the total cost of the stamp was $7.06. How many 37cents stamp did Allen Buy
  3. Math

    You have 36 stamps that you want to put into a stamp album. Stamp albums are made with either 4 to 6 pages. You need to decide which album you will use in order to have an equal number of stamps on each page. The question is: Choose …
  4. Algebra

    a colection of stamps consist of 2 cent stamps, 8 cent stamps, and 14 cent stamps. The number of 2 cent stamps is five more then twice the number of 8 cent stamps.the number of 14 cent stamps is three times the number of 8 cent stamps. …
  5. English

    Use coordination to combine each pair of sentences below into one sentence. Use a word or phrase that expresses the relationship shown in parentheses. 1.Most people collect stamps only as a hobby. Some people collect stamps as an investment. …
  6. Algebra

    A stamp collection consists of 3¢, 12¢, and 15¢ stamps. The number of 3¢ stamps is three times the number of 12¢ stamps. The number of 15¢ stamps is three less than the number of 12¢ stamps. The total value of the stamps in …
  7. math

    Thomas has a letter he wants to send to his girlfriend. the total perimeter of the blue stamp and envelop is 50 cm. the ratio between them is 1:4. What is the perimeter of the stamp?
  8. Probability

    Gina has 20 collector stamps. 8 stamps are blue, 6 are red and 5 have both colors. If a stamp is chosen at random, what is the probability that the stamp has a blue or red color on it?
  9. Algebra

    Luanne bought 50 stamps, some costing 37 cents and the rest costing 22 cents. She paid the postal clerk a total of $13.25 for all the stamps. How many of each type of stamp did Luanne buy?
  10. Math

    Ivan has a 5-cent stamp, a 10-cent stamp, and a 20-cent stamp.How many different combinations of postage can he form with the stamps?

More Similar Questions