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Complete the square |
2008-04-09 |
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From jessica:
can you check my answer please thanks
f(x)=2x^2-4x+5
I got 2(x+2)^2-3 for when it asked to simplfy it to standard form of a quadratic
equation
Answered by Stephen La Rocque. |
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A river boat |
2008-04-09 |
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From jessica:
heres a crazy riddle a river boat that travels 12 mph in still water makes a
pleasure trip to a city upstream and back in 3 hours. If the city is 10 miles aways, what is the rate of the current
Answered by Stephen La Rocque. |
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An isosceles right triangl |
2008-04-09 |
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From Stephanie:
An isosceles right triangle has an area of 35 sq cm. What are the lengths of the sides?
Answered by Walter Whiteley. |
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A regular polygon |
2008-04-09 |
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From chase:
name the regular polygon if the sum of the measures of the polygon is 1,440 and the measure of one angle is 144
Answered by Stephen La Rocque. |
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What is the easiest way to remember how to do percents? |
2008-04-09 |
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From Amy:
what is the easiest way to remember how to do percents?
Answered by Stephen La Rocque. |
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2500mL of Phosphoric acid |
2008-04-09 |
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From Trina:
If I have 2500mL of Phosphoric acid that has a fluoride concentration of 0.91% and need to increase it to 1.40% how much 49% HF do I need to add?
Answered by Harley Weston. |
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The zeros of a cubic |
2008-04-09 |
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From Ryan:
what are all the zeros of f(x)= x^3-1/2x^2+1/3x-1/6
Answered by Penny Nom. |
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Complete the square |
2008-04-09 |
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From jessica:
Use the technique of completing the square to put f(x)= 2x^2-4x+5
in the form f F(x)= a(x-h)^2+k were h,k=vertex of the parabola.
identify the coordinate (h,k)of the maximum or minimum point
of the associated parabola
Answered by Penny Nom. |
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cosec [arccos (1/y)] |
2008-04-09 |
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From Tom:
I am having trouble with this question. For y > 1, the value of cosec [arccos (1/y)] is?
Answered by Penny Nom. |
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Side lengths and angles in a regular octagon |
2008-04-09 |
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From Lori:
I am a builder and need to find the length of the sides of an octagon. I know the length between
the parallel sides (26 feet). What is the length of each side? What is the angle measurement?
Answered by Harley Weston. |
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Matrix multiplication |
2008-04-08 |
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From manashi:
i. why matrix division is not possible?
ii.when we add or subtract two matrix , getting the result by addind or subtracting correspondind elements....but in case of multiplication it is not but why?
Answered by Harley Weston. |
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méthode pour trouver l'air d'un carré |
2008-04-08 |
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From Mélodie:
je doit trouver au moins 4 manieres différentes de calculer l'air d'un carré.
j'en ai déja trouvée 2 mais il m'en faut le plus possible...
1. longueur x largeur
2. division en triangles, puis air des triangles et multipler par
l'air des triangles
Answered by Thierry Moisan. |
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A square garden of tulips |
2008-04-08 |
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From Vincent:
Each year Brandon plants tulip bulbs in a square flower bed. This year Brandon's flower bed has 29 more bulbs than it had last year. If the flower bed is still square how many tulip bulbs are in it this year?
Answered by Penny Nom. |
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The weight of 1 litre of milk |
2008-04-07 |
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From IMRAN:
WHAT WEIGHT IN KILOGRAMS DOES 1 LITRE OF MILK HAVE?
Answered by Penny Nom. |
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How many bags of mulch? |
2008-04-07 |
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From MJ:
I have an area that is 35' X 50' and I want to cover it with 2" of mulch.
Do I take length X Width X depth? Bags of mulch are sold in 2 or 3 cubic feet per bag.....I just want to know how
to do the math. can you please send me the equation?
Answered by Penny Nom. |
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