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- 1. Multiple ChoiceMadison leaves her house and bikes north at a constant speed of 10 miles per hour. If her dad leaves the same house two hours later, driving north at a constant speed of 15 miles per hour, how long will it take him, in hours, to reach Madison?2345
- 2. Multiple ChoiceIf (x-1)(x+4) = 0, what are the values for x?
I. 4
II. 1
III. –1
IV. –4I and IIIII and IVIII and IVI and II - 3. Multiple ChoiceBats detect the locations of objects by bouncing sound waves off of objects, in a process known as echolocation. The speed of a sound wave is approximately 350 meters per second. A bat emits a sound wave towards a tree 525 meters away. What is the time, in seconds, that it takes for the sound wave to reach the tree?0.511.52
- 4. Multiple Choicew = ݈g/8
h = 3w
An engineer determined that a bridge he is designing has maximum stability when its length, g, width, w, and height, h, are defined by the equations above. If he wants to build a bridge with a height of 9 meters, what should be the length of the bridge, in meters?4824126 - 5. Multiple ChoiceIf the sum of two consecutive integers is 15, what is their product?36485664
- 6. Multiple Choice
Which of the following equations describe the chart?f(x) = x - x2f(x) = x - 1f(x) = x2 - 1f(x) = x2 - 7. Multiple ChoiceIn DNA sequencing, a machine is able to identify the sequence of units of DNA, called base pairs. It costs approximately 10 cents to sequence 1000 base pairs. If an investigator would like to sequence a gene consisting of 120,000 base pairs from each of 100 samples, how much would it cost for him to obtain the sequences?$120$480$720$1200
- 8. Multiple Choice2x2 - x = 15
Which of the following is a correct value for x in the equation above?32-2-4 - 9. Multiple ChoiceThe velocity of a ball that is thrown upwards is represented by the equation v = -5t2 - 20t + 60, where v represents velocity and t represents time, in seconds. After how many seconds does the velocity of the ball become zero?23612
- 10. Multiple ChoiceIf x = 4y + 3 and y = -2x - 3, what is the value of xy?-1013
- 11. Multiple Choicey = x - 1y = x2 - 2x - 9y = (x - 1)2 - 9y = x2
- 12. Multiple ChoiceIf 32x + 2 = 272, what is the value for x?0123
- 13. Multiple Choice3a3a29a29a4
- 14. Multiple ChoiceIf the sum of the even integers between 1 and k, inclusive, is equal to 2k, what is the value of k?67912
- 15. Multiple ChoiceIf a is a non-zero digit in the numbers 1a2a and a31, what is the value of a when 1a2a + a31 = 2659?681215
- 16. Multiple Choice10151630
- 17. Multiple Choice320160277150
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