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A 15% markup |
2003-02-07 |
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From Holly:
what is 15% markup of 58.89? please show equation and why? which is correct? 58.89 divided by .85 or 58.89 times 1.15
Answered by Penny Nom. |
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Two equations in two unknowns |
2003-02-06 |
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From Patrick:
What are all ordered pairs of real numbers (x, y) for which: yx2 - 7x + 12 = 1 and x + y = 6?
Answered by Penny Nom. |
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Transformations of pattern blocks |
2003-02-06 |
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From Cheryl:
I am trying to help my 8th grade son with Transformations - use of patttern blocks. He has to trace a figure and reflect it across the x-axis, which I can do, but then it indicates include ordered pairs - that confuses me.
Answered by Penny Nom. |
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Two airplanes leave Dallas |
2003-02-06 |
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From A student:
TWO AIRPLANES LEAVE DALLAS AT THE SAME TIME AND FLY IN OPPOSITE DIRECTIONS. ONE AIRPLANE TRAVELS 80 MILES PER HOUR FASTER THAN THE OTHER. AFTER THREE HOURS, THEY ARE 2940 MILES APART. WHAT IS THE RATE OF EACH AIRPLANE?
Answered by Penny Nom. |
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The sum of the first 1000 even integers |
2003-02-06 |
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From Jill:
What is the sum of the first 1000 even integers?
Answered by Paul Betts. |
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Milliliters |
2003-02-04 |
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From James:
What is a milliliter?
Answered by Penny Nom. |
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Factoring |
2003-02-04 |
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From Marcin:
I am having a really hard time with the factor theorem. Can you please help me with the following? (a'3 means a to the exponent 3)
a)8a'3+64b'3c'6
b)8x'4-12x'3-44x'2+24x
c)x'4-21x'2-100
Answered by Penny Nom. |
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Filling in the back yard with dirt |
2003-02-04 |
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From Joe:
We just bought a house and need to start filling in the back yard with dirt to level it out. I measure 37'x 56' by 2' deep on an angle. I will be building a retaining wall at the 2' deep portion. The slop will go from the 2' to nothing at the top or near the house. I can't remember how to get the Sq. foot or cubic yards.
Answered by Penny Nom. |
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A train with 2 cars |
2003-02-04 |
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From Michael:
A train with 2 cars is traveling at a speed of 80 km/hr from town X to town y, located 800 km from each other. At the same moment that the train departed, a passenger started to walk back and forth from one end of car B to the other at a speed of 100cm/sec. Arriving in town Y, the passenger had already gone and returned 720 times. The length of car A is that of car B plus one fourth of the length of the locomotive, and the length of the locomotive equals the length of Car A plus one fifth of the length of car B. What is the total length of the train?
Answered by Penny Nom. |
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Problem solving |
2003-02-03 |
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From Brigitte:
My daughter is having lot's of problem with problem solving she is in grade 6. she is using mathematics in action from macmillan/ mcgraw- hill. Do you know of any way she can get help, and if there is any tests on line
Answered by Diane Hanson. |
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Arithmitic sequence |
2003-02-01 |
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From A student:
I am having problems solving this arithmetic sequence... 1, 5, 10, ___, 50, 1.00, ___, 10.00, ... I believe the answers to be 25 and 5.00 but I can't figure why.
Answered by Claude Tardif. |
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les formules d'aire et de volume de les solides |
2003-02-01 |
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From Annie:
Je cherche le nom des mathématiciens qui ont découvert les différentes formules d'aire et de volume de tous les solides ( boule, cube, les prismes, cylindre, cône, pyramide, polyèdres réguliers). Je cherche aussi à trouver comment ils ont démontré l'exactitude de ces formules. L'important, c'est de connaître le nom des mathématiciens qui ont découvert ces formules.
Answered by Claude Tardif. |
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Combinations of 1,2,3,4,5 and 6 |
2003-02-01 |
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From Kyle:
Today I was aked a question by my geometry teacher. It was, what is the sum of all the possible combinations of the numbers 1, 2, 3, 4, 5, and 6. He said all the possible combinations were 720. I would like to know how u could do this, and what the answer is.
Answered by Penny Nom. |
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1+2+3+...+500 |
2003-01-31 |
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From Brian:
What is the sum of the numbers from 1 to 500 inclusive?
Answered by Paul Betts. |
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Triangle perimeter |
2003-01-30 |
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From An Aunt:
Hi I'm the aunt of a middle school child. He need help with two problems and I don't understand how to show he how to do them. Can you help me. - How do you find the perimeter for X=4, X=0.7, and X=5/6?
- And an acute triangle that bottom is (3X+1) cm, left side is (X+4) cm and the right is (2X+5)cm.
Can you show me not only the answer but also the steps that you used.
Answered by Penny Nom. |
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