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The inverse of y=x^2+x+c |
2016-12-21 |
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From Sam:
What is the inverse of y=x^2+x+c for x?
Answered by Penny Nom. |
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The inverse of y = x(x - 2) |
2016-12-21 |
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From Sasha:
Hello, I recently stumbled upon this question and I haven't been able to figure it out.
Why is the inverse of y=x(x-2) not a function?
Suggest a domain restriction which would ensure that the inverse is a function.
Thank You :)
Answered by Penny Nom. |
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The area and radius of a circle |
2016-12-19 |
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From india:
How do you find the radius of a circle if only the area is given to you?
Answered by Penny Nom. |
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Joining a fitness center |
2016-12-18 |
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From Salem:
A fitness center offers a special price for group-class students. The cost of registration is 30 dollars and then you have to pay 25 dollars per month. What is the rule of the equation in the light of
c=---m+----?
Answered by Penny Nom. |
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980 cubic yards of dirt |
2016-12-17 |
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From Jondi:
I am trying to visualize 980 cubic yards of dirt by using a metaphor.
Would this be the size of a car?
A fire engine?
A semi-trailer?
How many trucks would you need to haul away 980 yards of dirt?
Answered by Penny Nom. |
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1/1-cosine(2x) - 1/1+ cos(2x) |
2016-12-14 |
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From Sean:
1/1-cosine(2x) - 1/1+ cos(2x)
Answered by Penny Nom. |
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Divisibility of 3n^5+7n |
2016-12-14 |
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From Parag:
Question from Parag, a student:
if n is a natural number,then 3n^5+7n is divisible by
a)2
b)3
c)5
d)7
i got the answer but still i need a valid alternate approach.
Answered by Penny Nom. |
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3^2x-5=27 |
2016-12-14 |
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From danaja:
solve for the following 3^2x-5=27
Answered by Penny Nom. |
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How far apart are the boats? |
2016-12-13 |
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From Halley:
Two boats leave port at the same time. Boat A travels east at a speed of 12 km/hr. Boat B travels southwest at a speed of 14 km/hr. After two hours, how far apart are the boats? North is 0 degrees. How do I figure this out.
Thanks
Answered by Penny Nom. |
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x^2 = -16 |
2016-12-12 |
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From A student:
x to the second power = -16
what number solves the equation?
Answered by Penny Nom. |
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The area of a city block |
2016-12-08 |
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From Miura:
A city block is three times as long as long as it is wide.if the distance around the block is 0.48 kilometers, what is the area of the block in square meters?
Answered by Penny Nom. |
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A sales tax of 7% |
2016-12-07 |
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From Kenneth:
Hello:
If a sales tax of 7% is placed on every $1.00 of merchandise for sale, is it correct to indicate
the tax as 7%/ per $1.00 or 7%/$1.00? If the calculation is expressed as 7%/$1.00 X $5.00,
the tax is not $0.35 but 0.35. Is a tax rate of 7% incorrectly represented as 7%/$1.00
since the dollar unit cancels from the multiplication?
I thank you for your reply.
Answered by Penny Nom. |
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The sum of three integers is 30 |
2016-12-06 |
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From Vaishnavi:
_+_+_:30. Blanks are to be filled by(1,3,5,7,9,11,13,15) and numbers can be repeated.
Answered by Penny Nom. |
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Profit and loss on two shirts |
2016-12-06 |
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From Mahesh:
A man purchases one shirt and one T-Shirt for Rs. 6000. He sells the shirt at a profit of 20% and T-Shirt at a loss of 10%, as a result he gains 2% on whole transaction. what is the cost price of the T-Shirt ?
Answered by Penny Nom. |
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Two boys on the same route |
2016-12-06 |
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From Abbey:
Starting from the same spot, one boy completed a route in 9 minutes and another boy completed it in 15 minutes. When will both boys be at the same starting point at the same time again?
Answered by Penny Nom. |
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