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Profit |
2012-10-05 |
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From kathie:
find the profit income is $500 expenses $120
Answered by Penny Nom. |
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Two circle problems |
2012-10-05 |
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From shahad:
question 1
find an equation for the circle through the point (0,0) and (6,0) that a tangent to the line y=-1
question 2
find an equation for the circle through the point (0,0) and (17,7) whose center lies on the line 12x-5y=0
Answered by Penny Nom. |
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Painting 400 drums |
2012-10-05 |
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From Jordan:
This cylinder is given:
Cylinder with a height of 84 cm and a diameter of 54 cm.
Question: The exterior of the drum (cylinder), except the base, is to be painted blue. calculate how many litres of paint will be needed to paint 400 drums if one litre of paint covers 8.8meters Squared.
Answer to nearest tenth of a litre.
Answered by Harley Weston. |
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\mbox |
2012-10-05 |
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From Jordan:
This cylinder is given:
Cylinder with a height of 84 cm and a diameter of 54 cm.
Question: The exterior of the drum (cylinder), except the base, is to be painted blue. calculate how many litres of paint will be needed to paint 400 drums if one litre of paint covers 8.8meters Squared.
Answer to nearest tenth of a litre.
Answered by Harley Weston. |
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Four tangent circles |
2012-10-04 |
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From renu:
inside of a circle K of radius length measure R,three circular discs A,Band C each of radius r are placed so that each touches the other two and K . express R in terms of r. in the space between K, A and B , another circular disc D is placed which just touches K, A and B. if the radius is s, show that (6+root3)s=(2+root3)r
Answered by Penny Nom. |
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Find an algebraic expression |
2012-10-03 |
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From Karen:
Question from Karen, a parent:
Find an algebraic expression relating the input and output.
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output |
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1 |
| 9 |
3 |
| 15 |
5 |
| 21 |
7 |
| 27 |
9 |
Answered by Penny Nom. |
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Solve 8t-r=12t for t |
2012-09-29 |
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From Monejah:
I need help solving 8t-r=12t for t
Answered by Penny Nom. |
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A problem involving simple interest |
2012-09-27 |
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From Tash:
The amount of money in a single year of an investment after P dollars were initially invested is A = P + Prt, where r is the rate of simple interest. What expression describes P? How much money was initially invested if the account has $1000 one year after the initial investment and the interest rate was 5%?
Answered by Penny Nom. |
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More on marbles in a jar |
2012-09-27 |
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From josh:
Question from josh, a student:
Suppose you have a jar containing 100 red marbles and 100 white marbles. A) If you draw 5 marbles in a row, throwing each marble across the room as you draw it, what is the probability that at least one of them was red? B) If you draw 101 marbles in a row, throwing each one across the room as you draw it, now what is the probability that at least one of them was red?
I saw that this answer was already answered but "The probability that at least one is red is 1 minus the probability that they are all white." makes no sense to me can you please explain i thought that each time a marble is taken out the amount left is different can you please explain better
Answered by Robert Dawson. |
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Profit and discount |
2012-09-24 |
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From ally:
A wholesaler purchased a wheat for $150 per tonne.He sold it at $170 per tonne.Calculate the percentage profit to (1 decimal place)if the wholesaler offered a 12% discount on the selling price.What could be the new selling price?
Answered by Penny Nom. |
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Guess and Check |
2012-09-24 |
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From Myron:
My daughter has homework involving Guess and Check. Her Math book is no help with the question in her homework so hopefully you can help me. Here's the question: "The sum of a number and it's double is 24. Use the Guess and Check method to find the answer".
Help!!
Answered by Robert Dawson. |
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Adding two fractions |
2012-09-19 |
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From jeanette:
Question from jeanette, a parent:
can you help me figure this according to BEDMAS I am lost
steps please:
\[\frac{12.75^2}{50} + \frac{13.49^2}{60}\]
I hope this is not too confusing for you it is to me...
Answered by Harley Weston. |
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The perimeter of a rectangle |
2012-09-19 |
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From aretha:
calculate the perimeter of a rectangle with the long side 462ft x 9inches and the short side 50% less.
Answered by Penny Nom. |
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What percent of her monthly take home pay are her monthly expenses? |
2012-09-19 |
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From tina:
a girls monthly take home pay is 1932.00. her monthly expenses total 1910.00. What percent of her monthly take home pay are her monthly expenses?
Answered by Penny Nom. |
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Changing the sign of an inequality |
2012-09-19 |
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From Bryauna:
Why do you change the signs in inequalities?!
Answered by Penny Nom. |
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