Clara simplifies (8b-4r)-(2-1) and says the result is 6b-5r. What error did Clara make? A. Clara incorrectly combined the b coefficients. The correctly simplified expression is 100-5r.
B. Clara incorrectly combined the r coefficients. The correctly simplified expression is 6b-3r.
C. Clara incorrectly combined the r coefficients. The correctly simplified expression is 6b+5r.
D. Clara incorrectly combined the b coefficients. The correctly simplified expression is -100-5r.

Need now max recorded the heights of 500 male humans. he found that the heights were normally distributed around a mean of 177 centimeters. which statements about max’s data must be true? a) the median of max’s data is 250 b) more than half of the data points max recorded were 177 centimeters. c) a data point chosen at random is as likely to be above the mean as it is to be below the mean. d) every height within three standard deviations of the mean is equally likely to be chosen if a data point is selected at random.

If 1.4% of the mass of a human body is calcium, how many kilograms of calcium are there in a 165-pound man? 1.0 kg ca 5.1 kg ca 1.0 x 102 kg ca 5.1 x 102 kg ca

I'm a polygon i have no parallel lines i am formed 3 line segments i have one right angle two of my angles are angles what am i