In the image below, abc ~ def what is the length of ef and the measure of d
a. 27; 41
b. 27; 49
c. 36; 41
d. 45; 49

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers

In trapezoid abcd, ac is a diagonal and ∠abc≅∠acd. find ac if the lengths of the bases bc and ad are 12m and 27m respectively.

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.