| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.14 |
| Score | 0% | 63% |
What is \( \frac{6x^8}{4x^3} \)?
| 1\(\frac{1}{2}\)x2\(\frac{2}{3}\) | |
| \(\frac{2}{3}\)x11 | |
| 1\(\frac{1}{2}\)x5 | |
| 1\(\frac{1}{2}\)x24 |
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:
\( \frac{6x^8}{4x^3} \)
\( \frac{6}{4} \) x(8 - 3)
1\(\frac{1}{2}\)x5
What is the next number in this sequence: 1, 5, 13, 25, 41, __________ ?
| 55 | |
| 52 | |
| 61 | |
| 63 |
The equation for this sequence is:
an = an-1 + 4(n - 1)
where n is the term's order in the sequence, an is the value of the term, and an-1 is the value of the term before an. This makes the next number:
a6 = a5 + 4(6 - 1)
a6 = 41 + 4(5)
a6 = 61
In a class of 23 students, 15 are taking German and 5 are taking Spanish. Of the students studying German or Spanish, 3 are taking both courses. How many students are not enrolled in either course?
| 17 | |
| 19 | |
| 6 | |
| 14 |
The number of students taking German or Spanish is 15 + 5 = 20. Of that group of 20, 3 are taking both languages so they've been counted twice (once in the German group and once in the Spanish group). Subtracting them out leaves 20 - 3 = 17 who are taking at least one language. 23 - 17 = 6 students who are not taking either language.
If \( \left|y - 1\right| \) - 5 = -3, which of these is a possible value for y?
| -5 | |
| 3 | |
| 6 | |
| 7 |
First, solve for \( \left|y - 1\right| \):
\( \left|y - 1\right| \) - 5 = -3
\( \left|y - 1\right| \) = -3 + 5
\( \left|y - 1\right| \) = 2
The value inside the absolute value brackets can be either positive or negative so (y - 1) must equal + 2 or -2 for \( \left|y - 1\right| \) to equal 2:
| y - 1 = 2 y = 2 + 1 y = 3 | y - 1 = -2 y = -2 + 1 y = -1 |
So, y = -1 or y = 3.
If there were a total of 50 raffle tickets sold and you bought 1 tickets, what's the probability that you'll win the raffle?
| 5% | |
| 15% | |
| 3% | |
| 16% |
You have 1 out of the total of 50 raffle tickets sold so you have a (\( \frac{1}{50} \)) x 100 = \( \frac{1 \times 100}{50} \) = \( \frac{100}{50} \) = 3% chance to win the raffle.