The graph shows the monthly revenue in millions of dollars of a growing company after the company doubled its advertising. Use the graph to solve the problem. 
What is the y-intercept?
A. 1
B. 4
C. 6
D. 2
Answer: D
Mathematics
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Find an equation for the tangent to the curve at the given point.y = x2 - x, (2, 2)
A. y = 3x - 4 B. y = 3x + 4 C. y = 3x + 6 D. y = 3x - 6
Mathematics
Convert as indicated. When necessary, round to the nearest tenth of a degree.90.9° C to degrees Fahrenheit
A. 131.6° F B. 195.6° F C. 82.5° F D. 18.5° F
Mathematics
Solve the system of equations using matrices. Use Gauss-Jordan elimination.
A. {(7, 4, 5)} B. {(7, 5, 4)} C. {(14, 4, -7)} D. {(-7, 4, 14)}
Mathematics
Find the vertex of the parabola associated with the quadratic equation.y = x2 - 6x + 18
A. (9, 0) B. (9, 3) C. (3, 9) D. (0, 3)
Mathematics