Here are 10 test scores: 30, 74, 76, 77, 78, 79, 80, 80, 82, 84. the mean of these scores is 74.
does this set have an outlier and, if so, how does removing it affect the mean?

Which mathematical statements are true? 1) if 3 is an odd number, then 3 times 3 is an even number. 2) if 6 is less than 7, then 4 is greater than 7. 3) six is divisible by 3, and 10 is a multiple of 2. 4) the average of the data is greater than the largest value in the data, or it’s less than the largest value in the data. 5) the slope of a linear graph is its rate of change, and the graph’s y-intercept is the initial value. 6) if an equilateral triangle has equal angles, then all its angles will measure 45°.

Simplify the expression and find the missing terms. the simplest form of has in the numerator and in the denominator.

Prove sin2a + cos2a - 1 / sin2a + cos2a + 1 = 1 - tana / 1 + cota