Mathhh questions 10 pts. ?

Question

Mathhh questions 10 pts. ?

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dont worryy their easy questions , only four but the first one to get them all right will get 10 pts :) ahah and i didnt make these questions up, i just want to se if you guys got the same answer as my cousin .

1. A bank contains 30 coins, consisting of nickels, dimes and quarters. there are twice as many nickels as quaters and the remaining coins are dimes. If the total value of the coins is 3.35, how many of each type of coin are in the bank?

2. Lewis bought two tyoes of book at the librarys summer book sale. Reference books are 6.50 each and paperbook novels are 4.25 each. he spent exactly 38.50. how many of each type of book did he buy?

3. Nat and her five friends went to an icecream shop. each person oredered a single scoop cone. their bill for 8.70 included a 0.36 sales tax. how much does once single scoop cone cost because before tax?

4. the population of a certain bacteria colony doubles every 20 minutes. at 1pm, there are 16billion bacteria in the colony. what was teh size(number amount) of the colony at 11 am that same day?

x*x thankyouuuu

Answer 1

um well first of all this is the wrong section..

Answer 2

2.

6.50 x 2 = 13

38.50 - 13 = 25.50

25.50/4.25 = 6

2 books at 6.50     (13.00)

6 books at 4.25     (25.50)

                              --------------

                                 38.50

3.

0.36 x 6 = 2.16 total sales tax

8.70 - 2.16 = 6.54 total ice cream

6.54/6 = 1.09 per single scoop

answer 1.09

cant be bothered to do the other ones.

Try reposting this in the Education &amp; Reference &gt; Homework help section, youll get more answers.

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