Post a New Question

math

posted by .

This was on my test and have a few more question that is from my test.

18.The Sum of five unequal natural numbers is 90. The second largest of these five numbers can be at the most?
A.19
B.41(41 is the right answer)
C.44
D.43
E.42
please show work.

22.In what month does the 301st day of the year occur?
The answer is October,but is there a work for this problem?
A.August
B.September
C.October
D.November
E.December

32.For how many positive integers for "n" in the following inequality?
4.2<3n<57
A.16
B.17
C.18
D.15
E.14
the answer is 17, but i'm not sure how.

42. If a=-9 and b=10, what is the value of a^2+4a(divide)2+3b?
A.93
B.-69
C.52.5
D.7.5
E.32
the answer is 93, but i got -69. Please help me with this question.

  • math -

    Making the first 3 as small as possible, they would have to be 1, 2, and 3
    let the 4th be x and the 5th be y
    then
    1+2+3+x+y = 90
    x+y = 84
    remember, y has to be the largest
    we want x to be as large as possible but still be less than y
    x y
    .. ..
    .. ..
    40 44
    41 43
    42 42 --->but they can't be equal
    43 41 ---> x is no longer less than y

    so it looks like x = 41 and y = 43
    the largest that the second largest number can be is 41

    22. The average number of days per month is 30
    301/30 = 10.0333
    and the 10th month is October
    or
    365-301 = 64 days left
    but Dec + Nov = 31+30 = 61
    so that puts you back into October

    32.
    4.2 < 3n < 57
    divide by 3
    1.4 < n < 19
    So n can be 2,3,4, ... , 17,18
    Count them, there are 17

    42.
    a^2 + 4a/2 + 3b
    = 81 + 4(-9)/2 + 3(10)
    = 81 - 18 + 30
    = 93

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Algebra

    The sum of 2 numbers is 19 Seven times the first number is five more than the second. What are the 2 numbers?
  2. Math

    Change the base five numbers to equivalent base ten numbers. Also take given base five numbers and write next five base numbers to five numbers. a. 23 five b.14 five c. 214 five
  3. Grade 8 Math

    Can you write them in Mathematical/numbers form I'll solve them myself. i don't really get it though i have written the first one in mathematical for but i'm not sure if that's right. 1. When six is subtracted from five times a certain …
  4. math

    the sum of five consecutive numbers is 28 more than the sum of the third and the fifth numbers.find the consecutive numbers
  5. Math

    The product of three whole numbers is 36. Five more than the sum of the three numbers is a perfect square. What is the sum of the numbers?
  6. Math

    What is the difference between the number of possible answers on a five question true-false test and a five -question multiple choice test withfour choices per question
  7. Math

    What is the difference between the number of possible answers on a five question true-false test and a five -question multiple choice test withfour choices per question
  8. math

    What is the difference between the number of possible answers on a five question true-false test and a five -question multiple choice test withfour choices per question
  9. Math- urgent

    The second of two numbers is five more than the twice first. The sum of the numbers is 44. Find the numbers. Show all work.
  10. math

    15. The sum of five unequal whole numbers is 90. The second largest of these five numbers can be at most A.19 B.41 C.43 D.89 please explain and show work.

More Similar Questions

Post a New Question