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A concrete driveway |
2014-08-03 |
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From Jonathan:
How many 90 pound bags of concrete will fill in a 3 inch deep, 20 foot long, 12 feet wide driveway?
Answered by Harley Weston. |
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What is the average of first 100 even numbers? |
2014-08-02 |
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From Faizan:
What is the average of first 100 even numbers?
Answered by Chris Fisher. |
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A 6 team sports schedule |
2014-08-02 |
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From Daniela:
Hello,
My husband and I are volunteering at our church's Jrs camp and we were given the task of making the schedule for sports. There will be 6 teams and a total of 3 games for two days. We would like for every team to play each other but we cannot figure it out.
Pls help!
Thanks.
Answered by Victoria West. |
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A word problem with fractions |
2014-08-01 |
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From nathanielcabalan:
The denominator of a fraction is one more than the numerator. If the numerator is increased by three, the resulting fraction is one more than the original fractional. Find the original fraction.
Answered by Penny Nom. |
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Dealing cards in the ratio of 4:3:6 |
2014-07-31 |
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From aneeqa:
Maria, Sofia and Diana shared some cards in the ratio of 4 : 3 : 6. Diana received 14 more cards than Maria. How many cards did Sofia receive?
Answered by Penny Nom. |
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The sum of the first 50 terms of an arithmetic progression |
2014-07-26 |
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From Joshua:
Hello ...my is Joshua...I'm a grade 11 student...I got a question
Calculate the sum of the first 50 terms of an arithmetic progression: 112:98:84
Answered by Penny Nom. |
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A word problem concerning averages |
2014-07-26 |
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From Bernie:
The average weight of a team of children is 50kg, Todd who weighs 56 kg then joins the team. The average weight of the new team is 51. How many children in the original team?
Answered by Penny Nom. |
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An arc subtended at the center of the Earth |
2014-07-20 |
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From Abhinav:
Meerut is 60 km from Delhi. Find the nearest second the angle subtended at the center of the earth by the arc joining these two points,earth being regarded as a sphere of 5940 km radius.
Answered by Penny Nom. |
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60% as much as $30. |
2014-07-18 |
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From Kenneth:
Question from Kenneth:
Hello:
Do you know why some "as...as" phrases indicate multiplication?
For example, ? is 60% as much as $30. This is equivalent to 60% X $30 = $18. How does this make sense?
I saw this example in an old textbook on business mathematics, but the author did not explain why it is equivalent
to multiplication.
I thank you for your reply.
Answered by Robert Dawson. |
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Selecting a meal at a school cafeteria |
2014-07-18 |
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From Gil:
A school cafeteria offers 2 main entrees, 3 fruits, 4 vegetables, and 3 drinks. If a plate consists of 1 entree, 2 vegetables, 1 fruit, and 1 drink, how many different plates can a cafeteria manager make? Please explain how you derived at answer. Thank you
Answered by Penny Nom. |
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Expand and simplify [x-3][x+3] |
2014-07-16 |
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From symion:
Expand and simplify [x-3][x+3]
Answered by Penny Nom. |
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An octagon around a tree |
2014-07-16 |
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From floyd:
I want to build an octagon 4 feet from base of tree from 4x4's. What length do I cut my pieces
Answered by Penny Nom. |
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Solve sin3x = cos2x |
2014-07-14 |
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From Emanuel:
If sin3x=cos2x, find the value of x when x<0<90'
Answered by Penny Nom. |
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16 golfers over 15 weeks |
2014-07-11 |
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From Steve:
I need a schedule for 16 golfers over 15 weeks, where each golfer is paired with a different golfer each week and plays 4 matches per week against 4 different pairs (each pair does not have to play each week)
Answered by Penny Nom. |
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Brandon went shopping - working backwards |
2014-07-11 |
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From Sindy:
Brandon went shopping & spent 1/4 of his money on shoes & 1/5 of the remainder on a new wallet. He then spent $60 on a pair of jeans. If he had $60 left, how much did Brandon start with?
Answered by Penny Nom. |
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