We found 99 items matching your search.
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A tugboat's speed |
2007-04-30 |
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From Amanda:
a tugboat must travel 24 miles against a 4 mile per hour current on the Potomac River and return. At what
constant speed must the tugboat travel to make the trip in 12 hours. Round answer to the nearest tenth mph.
Answered by Stephen La Rocque. |
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Simultaneous equations |
2007-04-16 |
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From kyrie:
simultaneous equation
4x + 3y = 21
2x * y = 8
Answered by Penny Nom. |
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Simultaneous equations with fractions |
2007-02-28 |
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From Alyca:
Hello Math Central, I am a grade 10 student taking Academic math. Our unit right now is method of substitution and elimination. I'm stuck on this one question that I've been doing forever. Please help =)
*For this equation I have to do method of elimination, but it's so much harder with fractions...could some one please explain to me how to do it step by step?*
x y 2
-- - -- = - --
3 6 3
x y 1
-- - -- = 1---
12 4 2
Answered by Steve La Rocque and Ashley Mang. |
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Simultaneous equations with envelopes |
2007-02-08 |
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From Mick:
There were 17 envelopes bought, some were brown, some were white. The brown envelopes cost one cent more per envelope than the white ones. The total cost was 80 cents. How much of each type of envelope was bought? --Many thanks!
Answered by Stephen La Rocque. |
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The substitution method |
2007-01-31 |
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From Victoria:
how do i solve this problem using the substitution method?
2x-5= -14
-7x+14y= -5
Answered by Stephen La Rocque. |
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The elimination method |
2007-01-31 |
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From Addrianna:
x-2y=2
3x-5y=7
Answered by Stephen La Rocque. |
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Simultaneous equations |
2006-11-06 |
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From An other:
e^2y-x+2=0
ln(x+3)-2y-1=0
Answered by Penny Nom. |
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Simultaneous Equations |
2006-05-24 |
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From Angie:
Question: solve the equations
2x-3y-z=0
3x-2y+z=-5
x+3y-2z=14
for x,y,z
Answered by Stephen La Rocque. |
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2x+5y=3 And -x+3y=-7 |
2006-04-03 |
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From Lloyd:
simplify 2x+5y=3 And -x+3y=-7
Answered by Penny Nom. |
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2x+3y=0 and 3x-y=0 |
2006-03-14 |
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From Lisa:
my name is lisa I am doing math for work and i have a math problem to solve and i need help with it here is the question 2x+3y=0 and 3x-y=0 this is one question can you help me please
Answered by Penny Nom. |
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One boundary of a pond is parabolic in shape. |
2006-01-20 |
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From Glenn:
One boundary of a pond is parabolic in shape. The boundary passes through the points A(-20,45), B(40,40) and E(30,35). The equation of the parabola is of the form y=ax2+bx+c. Find the equation of the parabola and the coordinates of the vertex of the parabola. Any assistance you could provide would be greatly appreciated.
Answered by Penny Nom. |
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Simultaneous Equations |
2005-12-21 |
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From Matt:
I have these two equations,
336 = 60a + 10b
and
432 = 84a + 6b
Am I right in saying both a and b are 4.8?
Answered by Penny Nom. |
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Simultaneous equations |
2005-10-13 |
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From Daniel:
5x + 3y = 22
4x - 7y = -20
Answered by Penny Nom. |
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Two equations |
2002-07-26 |
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From Derek:
1. 3x + 2y = 4
2. -7x + 2y = 24 finding x and y.
Answered by Penny Nom. |
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Pairs of equations |
2002-04-04 |
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From A student:
high school level
student is asking
y=4x x=-4y
x+y=5 3x+2y=20
y=x-1 3x-y=4
x+y=3 2x-3y=-9
x+5y=4
3x+15y=-1
. . .
Answered by Penny Nom. |
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