The mean temperature for the first 7 days in january was 6 °c.
the temperature on the 8th day was 1 °c.
what is the mean temperature for the first 8 days in january?

Jenisey has $24 to spend on seven pencils. after buying them she had $10. how much did each pencil cost.?

Liz had 140 pens and inna had 100 pens. after inna gave liz some pens, liz had 3 times as many pens as inna. how many pens did inna give liz?

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.