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Purchasing pens and pencils |
2008-11-07 |
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From Maggie:
A mechanical pencil costs 50 cents and a pen costs 25 cents. If I spend 5.00 on 17 pens and pencils, how many of each does that buy?
Answered by Penny Nom. |
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Compatible numbers |
2008-11-07 |
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From Erika:
When working with compatible numbers, when do you choose to round up or down? For example: In the problem: 373 divided by 4, one could round 373 to 400 and keep the 4 the same, and the answer would be 100; OR, one could round 373 down to 360 and keep the 4 the same, and the answer would be 90. When given the problem as an assignment, which way dictates how one would round, up or down?
Answered by Penny Nom. |
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A 4 digit number |
2008-11-06 |
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From Chris:
numbers 0 - 9 form a 4 digit number with no repetition.
It would round to 3000 if rounded to the nearest thousand
The digit in the tens place is twice the value of the digit in the thousands place.
It is an odd number.
It contains the largest digit.
It contains one digit less than 2.
The digit in the hundreds place is odd.
Can you find the 2 numbers?
Answered by Penny Nom. |
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The height of an equilateral triangle |
2008-11-06 |
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From touqeer:
My question is that how can we find the height of an equilateral triangle without using pythagoras theorem?
Answered by Penny Nom. |
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Forming 10 from 4 fours |
2008-11-06 |
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From Corderro:
I need a answer for 10 using only the number 4
Answered by Penny Nom. |
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1/8, 2/7, 1/2, 4/5, ..., ... |
2008-11-06 |
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From katie:
Inductive reasoning, what 1/8, 2/7, 1/2, 4/5, what would be the next two in th sequence.
Answered by Penny Nom. |
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La somme de son carré et de son cube |
2008-11-05 |
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From halima:
Trouvez un nombre entier tel que la somme de son carré et de son cube soit égale à 9 fois le nombre entier suivant.
Answered by Pierre-Louis Gagnon. |
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J'ai l'équation X^n=Y Je cherche à sortir n. |
2008-11-05 |
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From Jean-Philippe:
Bonjour.
J'ai l'équation X^n=Y
Je cherche à sortir n.
Existe-t-il une équation donnant n=f(X,Y) ?
Answered by Pierre-Louis Gagnon et Émile Létourneau. |
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The cost of a steel plate |
2008-11-05 |
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From Tammie:
What is the formula to calculate the following:
I have a plate of steel that is 1/4" x 48" x 192" at a price of $15.23 per square foot
What is the formula to calculate the cost if I only use 1/4" x 47-1/4" x 68-1/8" of that steel plate?
Answered by Penny Nom. |
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4 digit combinations |
2008-11-05 |
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From Laura:
I need to know all the number combinations possible with a 4 digit combination with double zero in the middle???
Answered by Penny Nom. |
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A trig limit |
2008-11-04 |
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From Teri:
Although I have this problem completely worked out in front of me I still cannot understand
how it was done. The problem is:
Find the limit.
lim x->0 sin2x/tan7x.
Answered by Harley Weston. |
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The area of a trapezoid |
2008-11-04 |
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From kelsey:
The area of a trapezoid is approximately 150cm2...the length is 26 cm, the
weight is 5cm...what is the height????
(show me the work that you did so i can understand)
Answered by Penny Nom. |
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A rectangle is twice as long as it is wide. |
2008-11-04 |
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From Nawal:
A rectangle is twice as long as it is wide.
If both its dimensions are increased by 4 m,
its area is increased by 88 m ^ 2.
Find the dimensions of the original rectangle.
Answered by Penny Nom. |
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Separating variables |
2008-11-04 |
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From Terry:
by separating variables solve the initial value problem
(x+1)y' + y = 0 y(0) = 1
Answered by Harley Weston. |
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Absolute value |
2008-11-04 |
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From Shane:
What is the absolute value of -4
Answered by Penny Nom. |
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