10/16/16
math help asap
a train travels 100 km in the same the plane covers 350km. If the speed of the plane is 20 km per less than 4 times the speed of the train, find both speeds.
Train speed?
planes speed?
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10/16/16
need help before test!!!
a boater travels upstream at top speed to his favorite fishing spot, a distance of 224 miles, in 4 hour. Returning, he finds that the trip downstream, still at top speed, takes only 3.5 hr. Find...
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10/16/16
Distance Formula
Determine if the points X(-6,-4), Y(2,-2) and Z(0,5) form the vertices of a right triangle.
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12/24/13
what should be subtracted from 7a^6-2a^5-3a^4+6a^3-4a^2+6a to get 3a^5+6a^4-5a^3+2a^2+3
try to solve but failed..
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12/21/13
Method of least squares
A magazine reported on a study of the reliability of a commercial kit to test for arsenic in groundwater. The field kit was used to test a sample of 20 groundwater wells in a country. In addition...
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