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Augmented matrix |
2011-12-14 |
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From Britney:
Write Augmented matrix and use row reduction to solve.
I need major help with this problem! Tomorrow is my semester test and I have no idea how to do this.
2x+5y=8
y-x=10
Answered by Robert Dawson. |
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The circumference and area of a circle |
2011-12-13 |
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From Mable:
A circle that going 70mi across using 22/7 I need the area,radius, and the circumference
and how to set up the steps can you help?
Answered by Penny Nom. |
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i+i^2+i^3+i^4...+i^102 |
2011-12-13 |
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From megan:
how do you solve i+i^2+i^3+i^4...+i^102
Answered by Robert Dawson. |
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Extended real numbers |
2011-12-12 |
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From Justin:
Hi there, I was wondering does +infinity=+infinity in the extended real number system? Basically, I was wondering does +infinity=+infinity since -infinity and any extended real number (except +infinity) are less than +infinity?
Sincerely,
Justin
Answered by Robert Dawson. |
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Exponential form |
2011-12-12 |
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From Zoey:
What is the exponential form of 1/8??
Answered by Penny Nom. |
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Simple interest |
2011-12-11 |
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From sandeep:
Use the formula I = Prt to solve.
Damon deposits $500 into a savings account that pays simple interest
at a rate of 0.65% per year. How long will it take Damon to earn $130
in interest?
Answered by Penny Nom. |
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factor 6x2-19x+3 |
2011-12-10 |
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From pedro:
factor 6x2-19x+3
Answered by Penny Nom. |
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Jennifer wants to fence in her backyard |
2011-12-09 |
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From Val:
Jennifer wants to fence in her backyard. A yard is rectangular and is 15 feet by 12 feet. One 12-foot side is against the house so it does not need fencing. How many feet of fencing does Jennifer need?
Answered by Penny Nom. |
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A 3000 gallon tank |
2011-12-08 |
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From Delores:
I need to know what size to build a tank to hold 3000 gallons of water
one side needs to be 8 ft width X 6 ft height how long does it need to
be?
Answered by Penny Nom. |
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What does 2xy mean? |
2011-12-07 |
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From dana:
I don't know what is 2xy what does that mean? is it 2x+2y or 2x times y
Please help! thank you for your time!! :)
Answered by Penny Nom. |
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The height of a flagpole |
2011-12-07 |
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From Grail:
at a certain point the angle of elevation of the top of a flagpole which stands on a level ground is 35 degree. 75 ft. nearer the pole, the angle of elevation is 50 degree. How high is the pole
Answered by Penny Nom. |
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Two trains passing each other |
2011-12-07 |
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From Tamkeen:
two trains 245m and 315m long are travelling toward each other at 90km/h and 54km/h respectively on parallel lines . how long do the train take to pass one another train the time they meet each other?
Answered by Penny Nom. |
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How many rpm does a 3.5 in. diameter wheel turn at 7 miles per hour? |
2011-12-06 |
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From Al:
how many rpm does a 3.5 in. diameter wheel turn at 7 miles per hour
Answered by Penny Nom. |
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A 2 by 9 array |
2011-12-06 |
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From Rosalynn:
what multiplication fact can be found by using the arrays for 2x9 and 5x9
Answered by Penny Nom. |
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Uniform acceleration |
2011-12-06 |
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From Android:
At a certain instant, two cars A and B are 2000 ft apart. At this instant, car A is traveling at 15 miles/hr. and accelerating at 3 ft/s^2 while B is moving towards A at 30 miles/hr. and an acceleration of 2 ft/s^2.
Find the ff:
a.) The possible time of their collusion in minutes.
b.) The distance in ft. each has traveled before collusion.
Answered by Penny Nom. |
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