| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.41 |
| Score | 0% | 68% |
How many 10-passenger vans will it take to drive all 34 members of the football team to an away game?
| 7 vans | |
| 8 vans | |
| 4 vans | |
| 5 vans |
Calculate the number of vans needed by dividing the number of people that need transported by the capacity of one van:
vans = \( \frac{34}{10} \) = 3\(\frac{2}{5}\)
So, it will take 3 full vans and one partially full van to transport the entire team making a total of 4 vans.
If \( \left|y - 2\right| \) - 2 = 0, which of these is a possible value for y?
| 4 | |
| -6 | |
| -2 | |
| -11 |
First, solve for \( \left|y - 2\right| \):
\( \left|y - 2\right| \) - 2 = 0
\( \left|y - 2\right| \) = 0 + 2
\( \left|y - 2\right| \) = 2
The value inside the absolute value brackets can be either positive or negative so (y - 2) must equal + 2 or -2 for \( \left|y - 2\right| \) to equal 2:
| y - 2 = 2 y = 2 + 2 y = 4 | y - 2 = -2 y = -2 + 2 y = 0 |
So, y = 0 or y = 4.
Which of the following is a mixed number?
\({7 \over 5} \) |
|
\({5 \over 7} \) |
|
\(1 {2 \over 5} \) |
|
\({a \over 5} \) |
A rational number (or fraction) is represented as a ratio between two integers, a and b, and has the form \({a \over b}\) where a is the numerator and b is the denominator. An improper fraction (\({5 \over 3} \)) has a numerator with a greater absolute value than the denominator and can be converted into a mixed number (\(1 {2 \over 3} \)) which has a whole number part and a fractional part.
| 2.5 | |
| 4.2 | |
| 1 | |
| 3.0 |
1
What is \( \frac{5y^8}{7y^4} \)?
| \(\frac{5}{7}\)y32 | |
| \(\frac{5}{7}\)y4 | |
| 1\(\frac{2}{5}\)y4 | |
| \(\frac{5}{7}\)y2 |
To divide terms with exponents, the base of both exponents must be the same. In this case they are so divide the coefficients and subtract the exponents:
\( \frac{5y^8}{7y^4} \)
\( \frac{5}{7} \) y(8 - 4)
\(\frac{5}{7}\)y4