Some people use a rule to see how many hours a child should sleep at night. Subtract the child's age in years from 30, then divide by 2. Samantha is 14 years old she wakes up every morning at 7 am. Use the rule to work out what time she should go to sleep?

What is the slope of the line shown below?

What is the solution set of the quadratic inequality x2- 5< 0? o {xl-55x55{x- 155x55){xl -55x5 15){x1 - 15 sx5/5)

Me 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.