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Logs and trig functions |
2000-09-12 |
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From Becky:
How do they get these answers? - log 8 + log 2 = ?
Answer is: log 16
- For 0 degree < x < 90 degree, how many solutions are there for the equation 2sin x = cos x?
Answer: 1
Answered by Penny Nom. |
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Factoring |
2000-09-12 |
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From Melissa:
I would like you to help me factor (x 6-y 6) & (a+b)2+3(a+b)-4
Answered by Penny Nom. |
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Two geometry problems |
2000-09-09 |
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From Becky:
What are all the real values of x that are solutions for the inequality [x-2] < 6? ( it's less than or equal to) What is the distance between the points with (x,y) coordinates (3,-2) and (-3,-1)?
Answered by Peny Nom. |
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Induction |
2000-09-07 |
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From Joe Peterson:
How do I prove by the principal of mathematical induction?
1.n+2.(n-1)+3.(n-2)+.....+(n-2).3+(n-1).2+n.1=(n(n+1)(n+2))/6
Answered by Paul Betts. |
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How many 17's and 19's total 1000? |
2000-09-07 |
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From Jonathan:
My question is: what 2 numbers would multiply 17 and 19 for a total of 1000. The numbers should not contain any decimal.
Answered by Penny Nom. |
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Roots of x^2 + 22 x + 112 |
2000-09-07 |
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From Brian R.:
I need to find the root of the quadratic equation of a square. The problem is x2 + 22x + 112 = 0.
Answered by Penny Nom. |
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Trinomial |
2000-09-06 |
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From Lea:
I need to find the trinomial value of k which makes a perfect square. The problem is x2 - 6x + k
Answered by Penny Nom. |
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Derivatives, there must be an easier way |
2000-09-06 |
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From Brad Goorman:
The direction read: Take the derivative of each expression. y = {1+[x+(x2 +x3)4]5}6
Answered by Harley Weston. |
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Euclidean distance |
2000-09-06 |
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From Velma Zahirovic-Herbert:
If d(x,y) is euclidean distance between x and y Prove that
d(x,y)>=0
if d(x,y)=0 than x=y
and d(x,y)=d(y,x)
Answered by Paul Betts. |
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Gravity |
2000-09-06 |
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From Robert Broomfield:
If they dropped a 1lb object from 40,000 feet in the air, at what speed would it it the ground?
Answered by Harley Weston. |
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n3 + 2n2 is a square |
2000-09-04 |
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From David Xiao:
determine the smallest positive integers, n , which satisfies the equation n3 + 2n2 = b where b is the square of an odd integer
Answered by Harley Weston. |
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Making milkshakes |
2000-09-04 |
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From Linda:
To make a chocolate milkshake, 3 parts chocolate syrup are mixed with 2 parts malt. To make a vanilla milkshake, 2 parts vanilla syrup are mixed with 1 part malt. If equal parts chocolate and vanilla milkshakes are mixed, what is the proportion of malt to milkshake?
Answered by Penny Nom. |
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A equation with a square root |
2000-09-03 |
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From Lea:
Please help with 2 plus the square root ( and under it has x plus 1) = 6
Thank you
Answered by Penny Nom. |
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Inequalities |
2000-09-02 |
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From Jennifer:
I would like some help with equations and inequalities. My first inequality is 3p-6>21 and 3q+11+8q>99.
Answered by Paul Betts. |
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A number problem |
2000-09-02 |
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From Lalita Balu:
Can you arrange 1234567890 to add up to 100?
Answered by Penny Nom. |
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