Cheryl says that the system of equations at the right MUST be solved by elimination rather than by substitution.
a. Explain why Cheryl is not correct.
- 7x + 12y = 13
7x - 11y = -9
b. Why might Cheryl think this is true?

Figure abcde is a regular pentagon. segment ae is located at a (2, 1) and e (4, 1). what is the perimeter of abcde? 4 units 6 units 8 units 10 units

What is the area of the triangle 10 13 12

Cor d? ? 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.