| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.15 |
| Score | 0% | 63% |
Which of the following is not a prime number?
5 |
|
9 |
|
2 |
|
7 |
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.
Convert b-3 to remove the negative exponent.
| \( \frac{-1}{b^{-3}} \) | |
| \( \frac{1}{b^{-3}} \) | |
| \( \frac{1}{b^3} \) | |
| \( \frac{-3}{b} \) |
To convert a negative exponent to a positive exponent, calculate the positive exponent then take the reciprocal.
If there were a total of 250 raffle tickets sold and you bought 7 tickets, what's the probability that you'll win the raffle?
| 15% | |
| 2% | |
| 7% | |
| 3% |
You have 7 out of the total of 250 raffle tickets sold so you have a (\( \frac{7}{250} \)) x 100 = \( \frac{7 \times 100}{250} \) = \( \frac{700}{250} \) = 3% chance to win the raffle.
How many 1 gallon cans worth of fuel would you need to pour into an empty 6 gallon tank to fill it exactly halfway?
| 6 | |
| 3 | |
| 2 | |
| 5 |
To fill a 6 gallon tank exactly halfway you'll need 3 gallons of fuel. Each fuel can holds 1 gallons so:
cans = \( \frac{3 \text{ gallons}}{1 \text{ gallons}} \) = 3
What is -9x7 - 4x7?
| -13x-7 | |
| -5x49 | |
| -13x7 | |
| -5x-14 |
To add or subtract terms with exponents, both the base and the exponent must be the same. In this case they are so subtract the coefficients and retain the base and exponent:
-9x7 - 4x7
(-9 - 4)x7
-13x7