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1
If 0.2t=2.2-0.6s and 0.5s=0.2t +1.1,then s=
A.1
B.3
C.10
D.11
E.30
请帮忙给出正确答案和分析，谢谢！
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2
Eight years from now, Carrie’s age will be twice Ben’s age. If Carrie’s current age is C and Ben’s current age is B, which of the following represents Carrie’s current age？
A.B
B.B+4
C.B+8
D.2B+8
E.3B
请帮忙给出正确答案和分析，谢谢！
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3
Lyle’s current age is 23 years, and Melanie’s current age is 15 years. How many years ago was Lyle’s age twice Melanie’s age？
A.16
B.9
C.8
D.7
E.5
请帮忙给出正确答案和分析，谢谢！
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4
In the figure below, lines a and b are parallel, and lines c and d are parallel.What is the measure of？∠x？
A.95°
B.75°
C.100°
D.105°
E.115°
请帮忙给出正确答案和分析，谢谢！
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5
Set R: {N 1 1, 2N 1 2, 3N 1 3, . . .} If N= 2, what is the 25th term of Set R？
A.29
B.48
C.50
D.63
E.75
请帮忙给出正确答案和分析，谢谢！
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6
If the poll is indicative of how the 10,000 registered voters of Springdale will actually vote in the election,which of the following is the best estimate of the number of votes Lue will receive in the election？
A.1500
B.2500
C.4000
D.5000
E.8000
请帮忙给出正确答案和分析，谢谢！
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7
Janelle cut a board 30 feet long into 2 pieces. The ratio of the lengths of the 2 pieces is 2:3. What is the length,to the nearest foot, of the shorter piece？
A.5
B.6
C.12
D.15
E.18
请帮忙给出正确答案和分析，谢谢！
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8
The fixed costs of manufacturing basketballs in a factory are $1,400.00 per day. The variable costs are $5.25 per basketball. Which of the following expressions can be used to model the cost of manufacturing b basketballs in 1 day？
A.$1,405.25b
B.$5.25b ？ $1,400.00
C.$1,400.00b + $5.25
D.$1,400.00 ？ $5.25b
E.$1,400.00 + $5.25b
请帮忙给出正确答案和分析，谢谢！
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9
In △ABC, the sum of the measures of ∠A and ∠B is 47°. What is the measure of ∠C ？
A.47°
B.86°
C.94°
D.133°
E.143°
请帮忙给出正确答案和分析，谢谢！
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10
The length of a rectangle is 3 times the length of a smaller rectangle. The 2 rectangles have the same width. The area of the smaller rectangle is A square units. The area of the larger rectangle is kA square units.Which of the following is the value of k ？
A.1/9
B.1/3
C.1
D.3
E.9
请帮忙给出正确答案和分析，谢谢！
