| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.68 |
| Score | 0% | 74% |
Find the average of the following numbers: 17, 9, 16, 10.
| 11 | |
| 13 | |
| 17 | |
| 10 |
To find the average of these 4 numbers add them together then divide by 4:
\( \frac{17 + 9 + 16 + 10}{4} \) = \( \frac{52}{4} \) = 13
A menswear store is having a sale: "Buy one shirt at full price and get another shirt for 40% off." If Damon buys two shirts, each with a regular price of $35, how much money will he save?
| $12.25 | |
| $17.50 | |
| $14.00 | |
| $3.50 |
By buying two shirts, Damon will save $35 x \( \frac{40}{100} \) = \( \frac{$35 x 40}{100} \) = \( \frac{$1400}{100} \) = $14.00 on the second shirt.
What is the distance in miles of a trip that takes 3 hours at an average speed of 20 miles per hour?
| 60 miles | |
| 180 miles | |
| 250 miles | |
| 320 miles |
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 distance:
distance = \( \text{speed} \times \text{time} \)
distance = \( 20mph \times 3h \)
60 miles
What is 8y4 x 2y2?
| 16y-2 | |
| 10y2 | |
| 16y6 | |
| 16y2 |
To multiply terms with exponents, the base of both exponents must be the same. In this case they are so multiply the coefficients and add the exponents:
8y4 x 2y2
(8 x 2)y(4 + 2)
16y6
Which of the following is not a prime number?
9 |
|
5 |
|
7 |
|
2 |
A prime number is an integer greater than 1 that has no factors other than 1 and itself. Examples of prime numbers include 2, 3, 5, 7, and 11.