Questions asked by Margaret McCoy

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• In the standard (x, y) coordinate plane, what is the slope of the line with equation 7y - 3x = 21?
  
• If x=2, y= -5, and z= -1, then what does (x-y) (x+y-z) equal?
  
• What is the least common denominator for adding the fractions 4/15, 1/12, and 3/8?
  
• To keep up with rising expenses, a motel manager needs to raise the $40.00 room rate by 22%. What will be the new rate?
  
• To increase the mean of 4 numbers by 2, by how much would the sum of the 4 numbers have to increase?
  
• If #r# and #s# can be any integers such that #s > 10# and #2r + s =15#, which of the following is the solution set for #r#? #r>=3#
  
• If a car averages 32 miles per hour, how far will it go in 20 minutes?
  
• A jar consists of red, green, and blue marbles in the ratio of 10:3:1. If the jar contains a total of 126 marbles, how many of the marbles are green?
  
• I can't figure this out Can yall help?