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An arithmetic sequence |
2017-11-30 |
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From yo:
x; 2x+1; 11 are three consecutive terms of an arithmetic sequence.calculate x
Answered by Penny Nom. |
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The derivative of f(x)=2^x/x |
2017-11-28 |
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From Chhavi:
f(x)=2^x/x.
Find f'(x).
Answered by Penny Nom. |
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GCD |
2017-11-25 |
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From A student:
Suppose a,b, c are integers such that gcd(a,b)=gcd(a,c)=1. Show that gcd(a,bc)=1.
Answered by Penny Nom. |
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Abstract algebra |
2017-11-25 |
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From A student:
Suppose a,b, c are integers such that gcd(a,b)=gcd(a,c)=1. Show that gcd(a,bc)=1.
Answered by Penny Nom. |
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Exponential form |
2017-11-25 |
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From Sherry:
What is the exponential form of 3sqrt 15?
Answered by Penny Nom. |
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10 digit permutations |
2017-11-24 |
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From Ed:
HI my question..
numbers1,2,3,4,5,6,7,8,9,0 how many combinations are there
example: 518, 269, 3470
example2:815,972, 3460
example3: 185,047,2369
Answered by Penny Nom. |
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Heat equation |
2017-11-23 |
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From Max:
What does du\dt=a(triangle)^2u mean. Can it be solved for t.
Answered by Penny Nom. |
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How many miles did he drive in one hour? |
2017-11-21 |
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From Ava:
Graham drove 42 1/3 Miles in 1 1/3 hours. How many miles did he drive in one hour?
Answered by Penny Nom. |
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An expression for the area of a triangle |
2017-11-19 |
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From hari:
why is area of a triangle drawn from centre of a circle i.e radii forming the sides is
1/2 *r^2 sin theta where r is radius
Answered by Penny Nom. |
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Jesse has dimes and nickels in his piggy bank. |
2017-11-18 |
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From Dee:
Jesse has dimes and nickels in his piggy bank.
The number of nickels is 3 times the number of dimes.
If the total amount is $8.50, how many coins are there in total?
Answered by Penny Nom. |
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Blair is 12 years younger than Serena right now. |
2017-11-18 |
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From Dee:
Blair is 12 years younger than Serena right now.
Three years ago Serena’s age was five times Blair’s age. What are their ages?
Answered by Penny Nom. |
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The mass of a length of tree trunk |
2017-11-13 |
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From SM:
What is the mass of a length of 1m of trunk a tree trunk of uniform cross section of area 0.5 sq.m is made of wood of relative density 0.8?
Answered by Penny Nom. |
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Splitting twice |
2017-11-11 |
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From Terry:
4 people are splitting 1/3 of something. 1 is to receive twice as much as the other 3. what it the fractional interest for each?
Answered by Penny Nom. |
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The graph of graph y= -2x-1 |
2017-11-11 |
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From Natividad:
How do you graph y= -2x-1?
Answered by Penny Nom. |
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A triangle with sides measuring 6, 8 and 10 inches |
2017-11-11 |
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From rukhsar:
A certain triangle has sides, which are, respectively, 6 inches, 8 inches, and 10 inches long. A rectangle equal in area to that of the triangle has a width of 3 inches. The Perimeter of the rectangle, expressed in inches, is
Answered by Penny Nom. |
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