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x^x = 2x |
2007-02-22 |
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From ramsay:
This has been bugging me for ages. How do find both real solutions to x^x = 2x? Obviously I have x=2, and there's another at about 0.35, but I can't work it out properly. Any help?
Answered by Penny Nom. |
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The size of a TV screen |
2007-02-22 |
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From katie:
The ratio of height to width for a tv screen is 9 to 16. How high is a screen that is 30 in. wide? I don't know how to work this, we have to show our work.
Answered by Gabriel Potter and Penny Nom. |
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Similar triangles |
2007-02-21 |
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From Vivienne:
The lengths of the sides of a triangle are 8, 15, & 17. If the longest side of a simlar triangle is 51, what is the length of the shortest side?
Answered by Stephen La Rocque and Penny Nom. |
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Surface area of a triangular prism |
2007-02-21 |
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From Katrina:
What is the formula to finding the surface area of a triangular prism?
Answered by Gabriel Potter. |
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A limit |
2007-02-21 |
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From Amanda:
I have tried to work out this problem by using the properties of limits and the conjugate rule to simplify but I am not real sure how to approach the problem or what they are asking for any help would be greatly appreciated. Amanda
Answered by Penny Nom. |
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Diagonals of a rectangular grid |
2007-02-21 |
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From matthew:
in a rectangular grid 3600x288 (or any large rectangle with an even number of units) how can I determine the number of vertices a diagonal line will pass through?
Answered by Stephen La Rocque and Penny Nom. |
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A circle tangent problem |
2007-02-21 |
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From Jason:
Please help me to solve this problem. Thank you very much. Find the equation of the circle tangent to 3x+y+14=0 and x+3y+10=0 with radius squareroot of 10.
Answered by Stephen La Rocque and Penny Nom. |
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What jobs involve using conics? |
2007-02-21 |
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From Nicki:
What jobs involve using conics?
Answered by Penny Nom. |
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A two-digit number is five times its units digit. |
2007-02-21 |
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From Pamela:
A two-digit number is five times its units digit. If the digits are reversed, the resulting number is 27 more than the original number. Find the original number.
Answered by Gabriel Potter and Penny Nom. |
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0.68 acres |
2007-02-21 |
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From Tembir:
what is the square feet of .68 acres?
What is the perimeter of .68 acres in feet?
Answered by Penny Nom. |
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Acceleration |
2007-02-20 |
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From thomas:
Don't know if this service still exists. ACCELERATION CALCULATION initial vel 0km/hr final vel 24km/hr time 3s
Answered by Stephen La Rocque. |
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Finding the equation of the circle |
2007-02-20 |
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From ning:
Given the radius of a circle square root of 10 tangent to the line 3x+y+19 = 0 and passing through (0,-3), how can i solve the equation of circle? thank you...
Answered by Chris Fisher, Steve La Rocque and Penny Nom. |
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Jim had 45 marbles and he lost 11 1/9% of them |
2007-02-20 |
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From Mesha:
If Jim had 45 marbles and he lost 11 1/9% of them, how many had he left?
Answered by Steve La Rocque and Haley Ess. |
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Find the area of the triangle |
2007-02-20 |
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From Christina:
Graph the function f(X)= x+1/x-1 and graph the tangent line to the function at the points A:(2,3) and B:(-1,0). The point of intersection of the two tangent lines is C. Find the area of the triangle ABC.
Answered by Stephen La Rocque. |
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A common tangent line |
2007-02-20 |
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From chris:
I have this problem I have been working on for days and cannot figure it out. it states: Find the two points on the curve y=x^4 - 2x^2 - x that have a common tangent line.
I know you use the first derivative to find the tangent line so if it is a common tangent line should you find two of the exact same tangent line equations at two coordinate points?
Answered by Chris Fisher. |
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