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Simultaneous equations |
2001-12-17 |
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From Matthew:
4x + y = 4
2x - 3y = 5 what is x and y
Answered by Penny Nom. |
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Making toys |
2001-12-17 |
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From Karen:
Jonathan and Morgan are two of Santa's elves. Jonathan can make a toy in eleven hours. Morgan can make the same toy in nine hours. How long it take for both Jonathan and Morgan to make the toy if they were working together?
Answered by Claude Tardif. |
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Composition of functions |
2001-12-16 |
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From Paula:
- if f(x)= 3x-1 and g(x)= 1/2x + 3 find fog(2)
- find the values of x for which tanx=0
Answered by Penny Nom. |
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A 1 m by 1 m square box in the xy-plane |
2001-12-15 |
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From Murray:
Inside a 1 m by 1 m square box in the xy-plane, there are finitely many line segments, whose lengths sum to exactly 10 m. Show that there exists a straight line in the plane which crosses at least six of these line segments. (Hint: first, show that there exists a straight line in the plane which crosses at least five of these line segments.)
Answered by Claude Tardif. |
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A right-angled triangle |
2001-12-13 |
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From Pamela, Jeff, Kayleigh and Jacob:
A right-angled triangle has one side that is 8 cm shorter that the hypotenuse. The other side is 1 cm shorter than the hypotenuse. Find the length of the sides.
Answered by Penny nom. |
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Algabra |
2001-12-13 |
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From Stephanie:
My name is Stephanie. My grade 7 class is doing some strange form of algebra which I've never done nor seen before. We are doing equations like these: 3y - 6 + 7 - 4y = 6y - 6. I don't really understand them and was wondering if you could help me do my homework and explain how to at the same time. It would be really great if you could!!!!! Thank you so much! -Stephanie - -9x - 5 - 8 + x = ?
- 5 + 6x - 3y + x + 8y = ?
- -x - 3 + 5x + 6y + 8x - 9= ?
Answered by Penny Nom. |
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Reduce 79,537/3,623,420 |
2001-12-13 |
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From Eliana:
How do you reduce 79,537/3,623,420.
Answered by Claude Tardif. |
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A 7% increase |
2001-12-12 |
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From Lorraine:
how do you calculate an old salary if the only information you have is current salary and the percentage increase received. For example if I make $15.86 an hour and I received a 7% increase, how much did I used to make?
Answered by Penny Nom. |
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For 7 the multiplicand is 143 |
2001-12-12 |
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From Cory:
For 7 the multiplicand is 143 I am asked to solve this, if you could help me it would be greatly appreciated!
Answered by Penny Nom. |
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A quadrilateral with 0 sets of parallel sides |
2001-12-12 |
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From Jess:
Ok well for quadrilaterals a parallelogram is a 4 sided figure with 2 sets of parallel sides and a trapezoid is a 4 sided figure with 1 set of parallel sides. So is there a name for a quadrilateral with 0 sets of parallel side?
Answered by Chris Fisher. |
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Painting walls |
2001-12-12 |
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From Rizwan:
3 sixth graders painted 4 walls in 3.5hrs. At that rate, how many walls would they paint in 7 hrs.
Answered by Penny Nom. |
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Recalling the basic facts |
2001-12-12 |
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From A parent:
My son is in 4th grade and is a very bright student. He is in the gifted program and makes straight A's on his report card and has through out school so far. My question is how can I teach him to memorize his basic math facts? He does well in math, but when he is placed in a times situation for completing math fact sheets he freezes up. He can not recall the basic facts when questioned at any other time either. He will calculate the answer in his head, like 6 + 3, but he can't just come out with the answer quickly. How can I help him?
Answered by Claude Tardif. |
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Division symbol |
2001-12-12 |
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From Amanda:
What is the name of the symbole used in a long divison problem that seperates the two factors? It looks like a little house.
Answered by Penny Nom. |
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Exponential form |
2001-12-11 |
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From Crystal:
Hi, I am asking a question on behalf of a homeschooling grade 11 student. She is having trouble with changing something like (3-4)2 into a exponential form. First of all she needs to know what the term means "exponential form" and then the process of it.
Answered by Penny Nom. |
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Fraction rationnelle |
2001-12-11 |
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From Audrey:
réduire en une seule fraction et simplifier.
(4-2x+x2)/(2+x) - (x+2)
Answered by Claude Tardif. |
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