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To produce an old photograph, a photographer charges x dollars to make a negative, 3x/5 dollars for each of the first 10 prints, and x/5 dollars for each print in excess of 10 prints. If 45 dollars is the total charge to make a negative and 20 prints from an old photograph, how many dollars the photographer charges to make a negative?
To produce an old photograph, a photographer charges x dollars to make a negative 3x/5 dollars for each of the first 10 prints, and x/5 dollars for each print in excess of 10 prints. If 45 dollars is the total charge to make a negative and 20 prints from an old photograph, how many dollars the photographer charges to make a negative?
A false- negative reaction to the tuberculin test may occur in the following circumstances
False negative tuberculin test is found in
The cause(s) of false negative test is/are
If x is negative , all BUT which of the following must also be negative?
In each expression below , N represents a negative integer . Which expression could have a negative value?