Questions asked by Gur K.

• Back to user's profile
• There is a fraction such that if 3 is added to the numerator, its value will be 1/3, and if 7 is subtracted from the denominator, its value will be 1/5. What is the fraction? Give the answer in the form of a fraction.
  
• Nine more than 3 times a certain number is 18. Find the number.?
  
• Find three consecutive integers whose sum is 201?
  
• When 15 is added to 7 times a certain number, the result is equal to subtracting 3 from 10 times that number. Find the number?
  
• Christopher can paint the interior of his house in 27 hours. If he hires Cynthia to help him they can do the same job together in 21 hours. If he lets Cynthia work alone, how long will it take her to paint the interior of his house?
  
• What is the solubility of the benzoic acid in water at 18°C? What is the solubility of benzoic acid in water at 75°C? Provide references?
  
• ) Explain the purpose of washing the sand with hot water. Why was it important to wash the sand with hot water? How would the experimental results be affected by washing the sand with cold water instead of hot water?
  
• ) Explain two sources of error that may occur during the filtration process. For each source of error, explain how this error would affect the values of the mass % for each component. (Would the mass % be larger or smaller than the correct value?
  
• If the larger of two numbers is divided by the smaller, the quotient is 7 and the remainder is 6. But if 3 times the greater is divided by twice the smaller, the quotient is 11 and the remainder is 6. What are the numbers?
  
• A farmer bought 100 ha of land, part at $1850 per hectare and part at $2250 paying for the whole $215000. How much land was there in each part? Do not round intermediate results. Round only final answers. Round to the whole. ha at $1850/ha ha at
  
• A certain concrete mixture contains 5.00% cement and 7.00% sand. How many kilograms of this mixture and how many kilograms of sand should be combined with 295 kg of cement to make a batch that is 12.0% cement and 14.0% sand? Carry out all calculations.
  
• A technician can assemble an instrument in 7.8 h. After working for 3 h, she is joined by another technician who can do the job himself in 7 hours. How many additional hours are required to finish the job?
  
• #(1+cotx)=(2cos2x)/(sin2x-2sin^2x)# prove?