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At what speeds were they travelling? |
2007-01-16 |
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From Maria:
Kim and Julie are joining Nicole at her parents cottage for the weekend. The cottage is 150km away from their neighbourhood. Kim can leave directly after school but Julie will be leaving after band practice, an hour and a quarter later. Kim took her time and drove slowly, averaging 20km/h slower than Julie. They both arrived at the same time.
At what speeds were they travelling?
Answered by Stephen La Rocque. |
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How much lemon oil do you need to make 10.15L of polish? |
2007-01-16 |
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From Sajad:
to make an environmentally safe furniture polish, you can combine lemon oil and mineral oil in the ratio 3:200, by volume. How much lemon oil do you need to make 10.15L of polish?
Answered by Penny Nom. |
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Percentage markup |
2007-01-16 |
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From Lauren:
MY DAD IS TRYING TO SELL PRODUCTS AT A 40% MARKUP. LET'S SAY THE COST IS $55.00. SHOULDN'T YOU JUST DO, 55 X 1.4 = 77 , SO THE $77 IS THE 40% MARKUP?? HE'S SAYING THAT YOU TAKE 55 / 60% = 91.67 . SO WHO'S FORMULA SHOWS YOU A TRUE 40% MARKUP OF $55.00 DOLLARS??????
Answered by Penny Nom. |
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Show that 3k+2 and 5k+3 are relatively prime |
2007-01-15 |
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From Andrea:
show that if k is a positive integer, then 3k+2 and 5k+3 are relatively prime
Answered by Penny Nom. |
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Probability and Lisa's rings |
2007-01-15 |
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From Spencer:
lisa has 9 rings in her jewelry box. five are gold and 4 are silver. if she randomly select 3 rings to wear to a party, find each probability p(2 silver or 2 gold)
Answered by Stephen La Rocque. |
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Standard deviation |
2007-01-15 |
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From Kayleigh:
After i have added up all the squared deviations what do i do???, what is meant by "divide by one less than the sample size"
Answered by Stephen La Rocque. |
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A line through the point (4, 7) and parallel to the line y=2 |
2007-01-14 |
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From Chasity:
i am suppose to write an equation of a line through the point (4, 7) and parallel to the line y=2. please help me
Answered by Penny Nom. |
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An arc, a cord and the radius of a circle |
2007-01-14 |
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From Kevin:
I have the length of the cord and the distance from the cord to the arc, is it possible to find the radius with just these parameters?
Answered by Penny Nom. |
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The height of a triangle |
2007-01-14 |
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From Shanelle:
I'm trying to find the height of a triangle but i only know the base and one of the sides as well as the angle between those two sides...but how can i find the height?
Answered by Penny Nom. |
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A line perpendicular to another line |
2007-01-13 |
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From Dusty:
Find an equation for the line perpendicular to: 3x - 4y + 1 = 0 passing through (4,7)
Answered by Leeanne Boehm and Penny Nom. |
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Calculating "yards" |
2007-01-13 |
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From Donny:
I want to learn how to figure out how many tons and yard are needed to do driveways and parking lots. OK from what I've read on the net i think its length width=square feet . i think i get that but i can figure out how to do the height . i understand a 6in would be 0.5 but how bout if its 2ins or 4 in . how do I put the the fraction in to working form.
Answered by Penny Nom. |
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An octagonal bird house |
2007-01-13 |
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From Soren:
I'm in the process of building a birdhouse that is an octagon (based on previous questions, looks like that's a familiar tune). The essential elements are known, but I get stuck when trying to determine the angle for the cuts that would be made to the thickness of the wood so that they all fit together when assembled. Each octagonal section is 7 inches in width and the peak of the roof will be 2 inches higher than the sides. My sense is that the angle cuts that need to be made to the 'height' of each piece of wood. By height I mean the thinnest part of the wood that is neither the length nor the width to use colloquial terms. While it's clear that a slight angle is needed, it would seem that the angle would necessarily change as the distance from the top of any one side to the peak changes. Please advise if more clarification is needed. The 2 inches is random and can be changed if more convenient. Whew!
Answered by Harley Weston. |
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What is his rate of walking for the entire trip? |
2007-01-12 |
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From Garmani:
A man walks 500 feet at 4 miles per hour and returns to the starting point at 3 miles per hour. What is his rate of walking for the entire trip?
Answered by Stephen La Rocque. |
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How many sq. ft. does she own? |
2007-01-12 |
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From Wayne:
I own 71/72 of 40 acres. My sister owns 1/72 of the same 40 acres. How many sq. ft. does she own?
Answered by Stephen La Rocque. |
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Throwing a stone downwards |
2007-01-12 |
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From Momo:
a stone is thrown vertically downward with an initial speed of 14m/s from a height of 65 m above the ground. A) how far does the stone travel in the first 2.0 s? B) what is the stone velocity just before it hits the ground?
Answered by Stephen La Rocque. |
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