Graph the equation.
?
?
A. ?
?
B. ?
C. ?
D. ?
E. ?
Answer: A
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Answer the question.What is the domain of the greatest integer function, given by f(x) = [[x]]?
A. {. . . , -2, -1, 0, 1, 2, . . . } B. [0, ?) C. (-?, ?) D. { 0, 1, 2, . . . }
Solve.If the three lengths of the sides of a triangle are known, Heron's formula can be used to find its area. If a, b, and c are the three lengths of the sides, Heron's formula for area is: A = 
where s is half the perimeter of the triangle, or s = 
(a + b + c).Use this formula to find the area of the triangle if a = 6 cm, b = 8 cm and c = 10 cm. 
A. 24
sq. cm
B. 48
sq. cm
C. 24 sq. cm
D. 4
sq. cm
Simplify. If an expression does not represent a real number, state this.-
A. -6 B. -36 C. 10.645 D. not a real number
Indicate whether the matrix is in row-reduced form.
a. The matrix is in row-reduced form.
b. The matrix is not in row-reduced form.