Math 47
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Question 1 of 8
1. Question
Question 1:
If a – b = 5 and c = 8a – 10 – 8b, then c = ?
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Question 2 of 8
2. Question
Question 2:
For x^{2} ≠ 49, (x – 7)²/(x² – 49) = ?
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Question 3 of 8
3. Question
Question 3:
At a time when the sun’s rays are striking the level ground at an angle of 37º, a tower casts a shadow that is 51 feet long, as shown in the figure. To the nearest foot, how many feet tall is the tower? (Note: sin 37º ≈ 0.60, cos 37º ≈ 0.80, tan 37º ≈ 0.75)
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Question 4 of 8
4. Question
Question 4:
The lengths of the sides of a triangle are 3, 8, and 9 inches. How many inches long is the shortest side of a similar triangle that has a perimeter of 120 inches?
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Question 5 of 8
5. Question
Question 5:
For all x > 0, 1/x – 2/3 = ?
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Question 6 of 8
6. Question
Question 6:
A function is defined by g(x) = x^{5}. Which of the following is an expression for g(g(x))?
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Question 7 of 8
7. Question
Question 7:
Greg sampled a group of random college seniors to see if they would rather have a rapper or a rock band for their spring fling concert. Of the 122 students surveyed, 42.8% responded that they would rather have a rapper. Based on this information, about how many students in the 845 senior class would rather have a rock band for the spring concert?
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Question 8 of 8
8. Question
Question 8:
The population of the town of Chappaqua increased from the years 1990 to 1999 by 8.40%. From 2000 to 2004, the towns population decreased by 3.30%. In the years 1990 to 2004, which percentage best represents the change in Chappaqua’s population?
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