Solve the inequality. Express your answer using interval notation.-21x - 3 ? -3(6x + 7)
A. [6, ?)
B. (-?, 6)
C. [6, ?)
D. (-?, 6]
Answer: A
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Perform the indicated operations in the proper order.-19 - (-4)(-2) + (- 45) ÷ (-5)
A. 
B. -36
C. -2
D. -18
Graph the given function. Identify the vertex and the intercepts.y = x2 + 2x - 8
A. Vertex: (- 1, - 9)
x-intercepts: -4 and 2
y-intercept: -8
B. Vertex: (1, - 9)
x-intercepts: -2 and 4
y-intercept: 8
C. Vertex: (1, - 9)
x-intercepts: -2 and 4
y-intercept: -8
D. Vertex: (- 1, - 9)
x-intercepts: 4 and 2
y-intercept: -8
Solve the problem.You are riding your motorcycle along a freeway traveling x miles per hour. The function 
describes the recommended safe distance, f(x), in feet, between your motorcycle and the other motorcycles on the freeway. Use the values in the table below to solve this exercise. 
Find 
f(x). Describe what this means in terms of your motorcycle's speed and the recommended safe distance.
A. 94; This means that the recommended safe distance between motorcycles traveling at 50 miles per hour is 94 feet.
B. 
f(x) does not exist.
C. 93.999; This means that the recommended safe distance between motorcycles traveling at 50 miles per hour is 93.999 feet.
D. 50; This means that the recommended safe distance between motorcycles traveling at 50 miles per hour is 50 feet.
Provide an appropriate response.Explain why the equation x2 = 49 has two real number solutions, while the equation 
= 7 has only one real number solution.
What will be an ideal response?