The mean is sometimes called the arithmetic mean to distinguish it from other possible means. For example, a different mean, called the harmonic mean (H.M.), is used to average speeds. This mean is defined to be the sum of the reciprocals of all scores divided into the number of scores. For example, the harmonic mean of the numbers 4, 5, 6, 6, 7, 8 is
Find the arithmetic mean and the harmonic mean of the numbers 1, 1, 6, 6, 7, 8, 8, 9, 9, and 10.Round your answers to the nearest tenth.
The arithmetic mean is__________The harmonic mean is__________
What will be an ideal response?
7.0; 3.0
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Sketch the graph of the equation. Identify the vertex and the intercepts.y = x2 + 4
A. Vertex: (0, 4);
x-intercepts: none;
y-intercept: (0, 4)
B. Vertex: (0,-4);
x-intercepts: (-2, 0) and (2, 0);
y-intercept: (0, -4)
C. Vertex: (4, 0);
x-intercept: (4, 0);
y-intercept: (0, 16)
D. Vertex: (0, 4);
x-intercepts: (-2, 0) and (2, 0);
y-intercept: (0, 4)
Factor completely, or state that the polynomial is prime.6x2 - 26x - 20
A. prime B. 2(3x - 2)(x + 5) C. (6x + 4)(x - 5) D. 2(3x + 2)(x - 5)
Use the table to solve the problem. Round to the nearest cent.
Felipe Rivera's savings account has a balance of $870. After 5 years what will the amount of interest be at 8% compounded quarterly?
A. $422.78 B. $34.80 C. $413.78 D. $427.78
Find the sum of the series.
A. 102 B. 86 C. 78 D. 44