Solve the rational inequality. Write the solution set using interval notation; then graph the solution set on a number line.
? 5x
A. [4, 5]
B. [0, 4] ? (5, ?)
C. (-?, 4] ? [5, ?)
D. [5, ?)
Answer: B
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Graph the quadratic function. Determine the vertex, find the equation of the axis of symmetry, find any x- and y-intercepts, and state the domain and range in interval notation.f(x) = -7x2 - 2x - 12
A. vertex: 
axis of symmetry: x = 
x-intercept: none; y-intercept: 12
domain: (-?, ?); range: 
B. vertex: 
axis of symmetry: x = 
x-intercept: none; y-intercept: -12
domain: (-?, ?); range: 
C. vertex: 
axis of symmetry: x = - 
x-intercept: none; y-intercept: 12
domain: (-?, ?); range: 
D. vertex: 
axis of symmetry: x = - 
x-intercept: none; y-intercept: -12
domain: (-?, ?); range: 
State whether you think the difference between what occurred and what you would expect by chance is statistically significant.In eighteen of the last twenty years the annual precipitation in a certain region has been less than in the previous year.
A. Statistically significant B. Not statistically significant
Evaluate the integral.
dx
A. 8 B. -3 C. 11 D. 3
Write the augmented matrix for the system. Do not solve.-2x - 2y = -26 9y = 45
A. 
B. 
C. 
D. 