Prelim Standard 2 Formulae and Equations 2

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Jack is 2 years older than his sister Jill. The sum of their ages is 24 years. If Jack is x years, which equation could be used to find the correct value of x?

1 point

x + (x + 2) = 24

2x + (x – 2) = 24

x +2x = 24

2x – x = 24

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1 point

12:45 am

1:50 am

2:15 am

4:05 am

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If N = k(2.5)³, what is the value of k when N = 312.5?

1 point

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What is the solution to the equation 6x = 3x + 9?

1 point

0.2

4.5

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1 point

–4°C

10°C

46°C

122°C

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1 point

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When Jim stops drinking alcohol at 10:30 pm, he has a blood alcohol content (BAC) of 0.08375. The number of hours required for a person to reach zero BAC after they stop consuming alcohol is given by the formula below. At what time on the next day should Jim expect his BAC to be 0.05?

1 point

12:45 am

1:50 am

2:15 am

4:05 am

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1 point

6.8

7.2

8.2

9.8

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1 point

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A patient is prescribed 0.4g of a medication per day. Each 10mL liquid capsule has the medication in the concentration 20mg/mL. How many capsules should the patient take per day?

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