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Trigonometry |
2000-09-02 |
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From david:
determine the sum of the angles A,B where 0 <= A , B <= 180 (degrees) sinA + sinB = sqr(3/2) , cosA + cosB = sqr(1/2)
Answered by Chris Fisher. |
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How many planes contain a line and a point? |
2000-08-30 |
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From Harold:
How many planes contain each line and point?
Answered by Harley Weston. |
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Adriana's earnings |
2000-08-28 |
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From Adriana:
On Friday Adriana earns half as much as she did on Thursday. On Saturday she earns twice as much as she did on Thursday, if her total for 3 days is $63.00 how much did she earn each day?
Answered by Penny Nom. |
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Velocity of a pendulum |
2000-08-28 |
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From Mekca:
A pendulum hangs from the ceiling. as the pendulum swings, its distance,d cm, form one wall of the room depends on the number of seconds,t, since it was set in motion. assume that the equation for d as a function of t is: d=80+30cos3.14/3t, t>0. estimate the instantaneous rate of change of d at t=5 by finding the average rates for t=5 to 5.1, t=5 to 5.01, and t=5 to 5.001.
Answered by Harley Weston. |
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Solving an equation |
2000-08-26 |
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From Patrick:
My question is how would u do a problem like this..........
[2x-37] =15?....u have to solve it for absolute value equations....????
Answered by Harley Weston. |
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Cubic yards and cubic feet |
2000-08-26 |
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From Rhonda:
have 2.47 cubic yards. what could the dimensions, in feet, be to equal this?
Answered by Penny Nom. |
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Subtracting fractions |
2000-08-26 |
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From Sarah Stanczyk:
how is this problem solved?? 3/ x+1 - 5/x
( 3 divided by x +1 subtracted by 5 divided by x)
Answered by Penny Nom. |
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The sum of the squares of 13 consecutive positive integers |
2000-08-25 |
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From Wallace:
Prove that it is not possible to have the sum of the squares of 13 consecutive positive integers be a square.
Answered by Harley Weston. |
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Three points on a line |
2000-08-25 |
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From Casey:
I am trying to find the slope and y-intercept of an equation. I have THREE x values and THREE y values. How do you do it? Help!
Answered by Penny Nom. |
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Three pattern questions |
2000-08-22 |
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From Michael Rodriguez:
I have 3 pattern questions that I need help answering, please. - 6 and 7 = 42
2 and 5 = 10
4 and 8 = 8
5 and 9 = ?
- 7 and 5 = 1
9 and 12 = 3
10 and 15 = 5
12 and 16 = ?
- 1st = 1
3rd = DEF
10th = *
6th = ?
Answered by Claude Tardif. |
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Covering 1, 1/2, 1/3,... |
2000-08-22 |
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From Wallace:
Consider the points 1, 1/2, 1/3, ... on the real number line. You are given five small bars, all of length p, which are to be placed on the number line such that all points will be covered. What is the minimum value of p that will allow you to do this?
Answered by Penny Nom. |
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Slope |
2000-08-19 |
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From John K. DePonte:
My question is to why the variable "m" was chosen to represent the slope of a linear equation. I always told my class to think of "m" for "m"ountain slope. But what is the real reason for this?
Answered by Penny Nom. |
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Six typists |
2000-08-19 |
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From Paula Duncan:
If it takes a typist 4.5 hours to type 860 words, how many hours would it take 6 typist to do 16800 words?
Answered by Penny Nom. |
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Three consecutive odd integers |
2000-08-18 |
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From Wallace:
A six-digit integer XYXYXY, where X and Y are digits is equal to five times the product of three consecutive odd integers. Determine these three odd integers.
Answered by Paul Betts. |
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Two word problems |
2000-08-16 |
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From Bridget:
A whale's head is 72 inches long... its tail is as long as its head plus half the length of its body, and its body is half the entire length. How long is the whale? Also, An author published a book every two years. When the seventh one was published, the sum of the years of publication was 13,804. In what year was the author forst published?
Answered by Penny Nom. |
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