| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.58 |
| Score | 0% | 72% |
If a car travels 50 miles in 2 hours, what is the average speed?
| 25 mph | |
| 50 mph | |
| 65 mph | |
| 20 mph |
Average speed in miles per hour is the number of miles traveled divided by the number of hours:
speed = \( \frac{\text{distance}}{\text{time}} \)What is the least common multiple of 8 and 16?
| 16 | |
| 15 | |
| 11 | |
| 66 |
The first few multiples of 8 are [8, 16, 24, 32, 40, 48, 56, 64, 72, 80] and the first few multiples of 16 are [16, 32, 48, 64, 80, 96]. The first few multiples they share are [16, 32, 48, 64, 80] making 16 the smallest multiple 8 and 16 have in common.
What is -8c6 x 4c7?
| -32c | |
| -32c13 | |
| -32c42 | |
| -32c-1 |
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:
-8c6 x 4c7
(-8 x 4)c(6 + 7)
-32c13
Solve 2 + (2 + 3) ÷ 4 x 2 - 52
| 2 | |
| \(\frac{8}{9}\) | |
| 1\(\frac{1}{6}\) | |
| -20\(\frac{1}{2}\) |
Use PEMDAS (Parentheses, Exponents, Multipy/Divide, Add/Subtract):
2 + (2 + 3) ÷ 4 x 2 - 52
P: 2 + (5) ÷ 4 x 2 - 52
E: 2 + 5 ÷ 4 x 2 - 25
MD: 2 + \( \frac{5}{4} \) x 2 - 25
MD: 2 + \( \frac{10}{4} \) - 25
AS: \( \frac{8}{4} \) + \( \frac{10}{4} \) - 25
AS: \( \frac{18}{4} \) - 25
AS: \( \frac{18 - 100}{4} \)
\( \frac{-82}{4} \)
-20\(\frac{1}{2}\)
21 members of a bridal party need transported to a wedding reception but there are only 4 5-passenger taxis available to take them. How many will need to find other transportation?
| 4 | |
| 1 | |
| 5 | |
| 3 |
There are 4 5-passenger taxis available so that's 4 x 5 = 20 total seats. There are 21 people needing transportation leaving 21 - 20 = 1 who will have to find other transportation.