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Find the next term |
2000-08-12 |
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From Ashley:
8,27,64
I need the next three numbers & I can't figure it out. I have worked on this all day.
Answered by Penny Nom. |
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Some trigonometry |
2000-08-11 |
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From Angela:
I have some PreCal questions. I am a student at the secondary level. I would be very grateful for your help. Solve the equation for theta (0 <= theta < 2pi). tan2(theta) = 3 I know sec2(theta) -1 = tan2(theta)
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Answered by Harley Weston. |
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isomorphisme |
2000-08-10 |
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From Romain Kroes:
Pour les beoins d'un ouvrage d'économie que je suis en train de terminer, pouvez-vous me dire qui est (sont) l'inventeur de l' "isomorphisme" en mathématiques (calcul tensoriel)?
Answered by Claude Tardif. |
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A problem with a quadratic |
2000-08-09 |
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From David Xiao:
Find the value of a such that 4x2 + 4(a-2)x - 8a2 + 14a + 31 = 0 has real roots whose sum of squares is minimum.
Answered by Harley Weston. |
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PreCalculus |
2000-08-09 |
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From Angela:
Use absolute values to define the interval or pair of intervals on the real line.
<--|--- |--- ]--- |--- |--- |--- [---| ---|-->
18 19 20 21 22 23 24 25 26
A car is moving at the rate of 50 miles per hour, and the diameter of its wheels is 2.5 feet.
a) Find the number of revolutions per minute that the wheels are rotating.
b) Find the angular speed of the wheels in radians per minute.
Answered by Harley Weston. |
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The angle of rotation |
2000-08-03 |
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From Jay:
I have the following information Given. (X1, Y1) Origional Point
(X2, Y2) Origional Point After a Rotation
(Xa, Xb) Center of Rotation What formula would I use to figure out the angle the point was rotated?
Answered by Chris Fisher and Harley Weston. |
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Area of a circle |
2000-08-03 |
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From Larry:
I know the formula is-- pi r squared--. For a circle 4 inches in diameter, do I multiply pi (3.1416) by the radius (2") then square the answer to that ie: 3.1416 X 2 squared or do I square the radius (2 X 2") then multiply by pi (3.1416) ??
Answered by Penny Nom. |
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Graphing an inequality |
2000-08-02 |
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From Lori:
How do I find x and y and graph this problem 3x + y < 5
Answered by Penny Nom. |
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Un polyedre ayant comme face 20 triangles |
2000-08-02 |
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From Sonia:
J'aimerai savoir comment s'appelle un polyedre ayant comme face 20 triangles équilatéraux égaux.
Answered by Chris Fisher. |
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Two linear systems |
2000-08-01 |
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From A student:
please help me with this homework question. 5/x + 6/y= 19/6 3/x + 4/y =2
hint: let a = 1/x and b = 1/y substitute these expressions into the system to find a and b. Then find x and y. This is a question I answered wrong on a test: solve the given system for x, y, and z. Express your solutions in terms of a, b, and c.
Answered by Penny Nom. |
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Making a paper cone |
2000-07-30 |
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From John:
The question of how to lay out & cut out of paper, cones came up. I would like the cone have :
A base of 4 inches
and height of
4 inches,
6 inches,
8 inches.
Answered by Harley Weston. |
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The circumference of a circle |
2000-07-30 |
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From Not a student:
An equalateral triangle is enclosed in a circle. The three corners touch the edges of the circle. One side of the triangle is 12. What is the circumference of the circle?
Answered by Penny Nom. |
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A semi-circle and a triangle |
2000-07-28 |
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From Ben:
A semi-circle and an isosceles triangle ABC have the same base AB and the same area. The equal angles in the triangle are BAC and CAB. I have to find the value of each of these angles.
Answered by Harley Weston. |
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LOG(LN(x)) = 1 |
2000-07-28 |
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From An algebra student:
LET F(x)=LOG X AND G(x)= LN X. SOLVE (f *G)(x)= 1
SHOW COMPOSITION AND USE DEFINITION OF LOGS.
Answered by Harley Weston. |
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(mn + m + n)/(m^2 + n^2) = 1 |
2000-07-24 |
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From William:
Find all pair of positive integers m and n such that mn + m + n divides m2 + n2 = 1.
Answered by Peny Nom. |
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