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Pumping water into a tank |
2008-09-13 |
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From nadha: A water pump can fill a tank at the rate of 750 litres per hour.A tank has a capacity of
9000 litres. Find the time needed to fill 7/15 of the tank? Answered by Stephen La Rocque. |
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Three addends that sum to ten |
2008-09-13 |
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From Alfred: How many probabilities are there to have 3 addends to get a sum of 10? What is the formula? Answered by Harley Weston. |
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Grouping addends |
2008-09-13 |
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From juan: how do you group the addends then find the sum: 2+4+6= Answered by Penny Nom. |
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The height and base of a triangle |
2008-09-12 |
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From Bailey: The length of the base of a triangle is 1cm less than 5 times the height of the triangle. The area of the triangle is 21 square cm. What is the the height of the triangle and the length of the base of the triangle? Answered by Stephen La Rocque. |
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A number that divides by six but not by three |
2008-09-12 |
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From Ken: A number that divides by six but not by three Answered by Stephen La Rocque and Victoria West. |
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Cutting a pipe on a 45 degree angle |
2008-09-12 |
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From Bakshani: how do you a mark a pipe 5 inch diameter and cut it to form a 45 degree angel Answered by Stephen La Rocque. |
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A garden in the shape of an isosceles triangle |
2008-09-12 |
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From Rita: Gregory wants to build a garden in the shape of an isosceles triangle with one of the congruent sides equal to 12 yards. If the area of his garden will be 55 square yards, find, to the nearest tenth of a degree, the three angles of the triangle. Answered by Penny Nom. |
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The average height of an attic |
2008-09-12 |
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From oliver: I need to find out the average height of a specific volume/area.
a standard house shape side walls height 10m, height in centre of house 15m.
width 15m length 25m (the roof spans the width)
Within the house in the corner there is a (box shape) room which is 5m in height by 3m wide and 4 m long
How do i work out the average height of the space directly above the room (same floor area)? Answered by Stephen La Rocque and Harley Weston. |
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The area of a quadrilateral |
2008-09-11 |
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From Mike: How do I find the area of a quadrilateral that has one sloped side? Answered by Penny Nom. |
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Intercepts |
2008-09-11 |
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From megan: When I have problems like y=x(x^2-3), to find the x- and y-intercepts, I set each one to 0. But where do I go from there? Answered by Penny Nom. |
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Putting fractions in order |
2008-09-11 |
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From kaby: whats the answer for this? put it from least to greatest: 1/4, 1/9, 1/8 Answered by Penny Nom. |
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A price reduction and a discount |
2008-09-11 |
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From Rita: A store advertises that during its Labor Day sale $15 will be deducted from every purchase over $100. In addition, after the deduction is taken, the store offers an early-bird discount of 20% to any person who makes a purchase before 10 a.m. If Hakeem makes a purchase of x dollars,
x > 100, at 8 a.m., what, in terms of x, is the cost of Hakeem's purchase?
(1) 0.20x - 15 (3) 0.85x - 20
(2) 0.20x -3 (4) 0.80x - 12 Answered by Penny Nom. |
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Distance, time and rate |
2008-09-11 |
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From Pauline: During the first part of a trip, a canoeist travels 100 miles at a certain speed. The canoeist travels 25 miles on the second part of the trip at a speed 5 mph slower. The total time for the trip is 5 hrs. What was the speed on each part of the trip? Answered by Penny Nom. |
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The perimeter of an equilateral triangle |
2008-09-11 |
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From Gerry: How can I find the perimeter (length of side) of an equilateral triangle if the only information I have is the altitude? Answered by Penny Nom. |
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Supplementary angles |
2008-09-11 |
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From Shanaz: Find an angle such that 3 times its supplement equals 450. Answered by Penny Nom. |
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