Write using exponential notation.7 ? 7 ? 9 ? 9 ? 9 ? 9 ? 5

A. 7 ? 9 ? 57
B. 27 ? 49 ? 15
C. (7 ? 9 ? 5)7
D. 72 ? 94 ? 5

Answer: D

Mathematics

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The augmented matrix of a system of equations has been transformed to an equivalent matrix in row-echelon form. If the system is consistent, then give the solution. If it is not, then state that it is inconsistent.

A. (2, 5) B. (5, 2) C. (4, - 2) D. Inconsistent

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Mathematics

Solve the problem.For the following table of data, a.Draw a scatterplot.b.Calculate the correlation coefficient.c.Calculate the least squares line and graph it on the scatterplot.d.Predict the y-value when x is 25.?

A. a.

b. 0.950
c. Y = 1.7x + 8.5

d. 51
B. a.

b. 0.903
c. Y = 2x + 6.5

d. 56.5
C. a.

b. 0.950
c. Y = 1.7x

d. 42.5
D. a.

b. 0.950
c. Y = 1.7x + 7.5

d. 50