| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.32 |
| Score | 0% | 66% |
Find the average of the following numbers: 16, 12, 15, 13.
| 17 | |
| 10 | |
| 19 | |
| 14 |
To find the average of these 4 numbers add them together then divide by 4:
\( \frac{16 + 12 + 15 + 13}{4} \) = \( \frac{56}{4} \) = 14
This property states taht the order of addition or multiplication does not mater. For example, 2 + 5 and 5 + 2 are equivalent.
commutative |
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associative |
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distributive |
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PEDMAS |
The commutative property states that, when adding or multiplying numbers, the order in which they're added or multiplied does not matter. For example, 3 + 4 and 4 + 3 give the same result, as do 3 x 4 and 4 x 3.
How many hours does it take a car to travel 440 miles at an average speed of 55 miles per hour?
| 4 hours | |
| 8 hours | |
| 6 hours | |
| 7 hours |
Average speed in miles per hour is the number of miles traveled divided by the number of hours:
speed = \( \frac{\text{distance}}{\text{time}} \)Solving for time:
time = \( \frac{\text{distance}}{\text{speed}} \)
time = \( \frac{440mi}{55mph} \)
8 hours
Monty loaned Christine $300 at an annual interest rate of 6%. If no payments are made, what is the total amount owed at the end of the first year?
| $309 | |
| $327 | |
| $315 | |
| $318 |
The yearly interest charged on this loan is the annual interest rate multiplied by the amount borrowed:
interest = annual interest rate x loan amount
i = (\( \frac{6}{100} \)) x $300
i = 0.06 x $300
No payments were made so the total amount due is the original amount + the accumulated interest:
total = $300 + $18Which of the following statements about exponents is false?
b0 = 1 |
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all of these are false |
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b1 = 1 |
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b1 = b |
A number with an exponent (be) consists of a base (b) raised to a power (e). The exponent indicates the number of times that the base is multiplied by itself. A base with an exponent of 1 equals the base (b1 = b) and a base with an exponent of 0 equals 1 ( (b0 = 1).