Find the exact value of the expression.cos 20° sin 70° + sin 20° cos 70°
A. 0
B. 1
C. -1
D. 2
Answer: B
Mathematics
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Use roster notation to write the set.The set of all integers that are not natural numbers
A. {. . ., -3, -2, -1} B. {. . ., -3, -2, -1, 0} C. {0, 1, 2, 3, . . .} D. {0}
Mathematics
Solve the equation.-6 = b - 9
A. -15 B. 3 C. -3 D. 15
Mathematics
Determine whether the lines through each pair of points are perpendicular.(4, -9) and (-12, -7); (3, -8) and (2, -16)
A. perpendicular B. not perpendicular
Mathematics
When solving a system of linear equations with the unknowns x, y, and z using the Gauss-Jordan elimination method, the following matrix was obtained. What can be concluded about the solution of the system?
What will be an ideal response?
Mathematics