A. A 25-word classified ad would cost $17.50
Explanation: 0.55 x 10 = 5.5. 5.5 + 12 = 17.5
B. A 50-word classified ad would cost $31.25
Explanation: 0.55 x 35 = 19.25. 19.25 + 12 = 31.25
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Compare the slopes of the 4 equations, which is the number in the term with "x". The slope with highest absolute value is the steepest. Positive slope means the function is ascending left to right, negative slope means it is descending left to right. If you only care that it is the steepest, regardless of whether it is ascending or descending, then the answer is (D).
X = 20
This is an isosceles triangle so third angle is also 2x because of symmetry.
Angle sum = 5x + 2x + 2x = 9x = 180 degrees
