| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.32 |
| Score | 0% | 66% |
Convert c-4 to remove the negative exponent.
| \( \frac{-1}{-4c} \) | |
| \( \frac{-4}{c} \) | |
| \( \frac{1}{c^{-4}} \) | |
| \( \frac{1}{c^4} \) |
To convert a negative exponent to a positive exponent, calculate the positive exponent then take the reciprocal.
The __________ is the greatest factor that divides two integers.
greatest common factor |
|
least common multiple |
|
absolute value |
|
greatest common multiple |
The greatest common factor (GCF) is the greatest factor that divides two integers.
What is the greatest common factor of 64 and 80?
| 62 | |
| 18 | |
| 4 | |
| 16 |
The factors of 64 are [1, 2, 4, 8, 16, 32, 64] and the factors of 80 are [1, 2, 4, 5, 8, 10, 16, 20, 40, 80]. They share 5 factors [1, 2, 4, 8, 16] making 16 the greatest factor 64 and 80 have in common.
How many 2 gallon cans worth of fuel would you need to pour into an empty 16 gallon tank to fill it exactly halfway?
| 4 | |
| 36 | |
| 6 | |
| 8 |
To fill a 16 gallon tank exactly halfway you'll need 8 gallons of fuel. Each fuel can holds 2 gallons so:
cans = \( \frac{8 \text{ gallons}}{2 \text{ gallons}} \) = 4
What is the next number in this sequence: 1, 3, 7, 13, 21, __________ ?
| 33 | |
| 31 | |
| 38 | |
| 30 |
The equation for this sequence is:
an = an-1 + 2(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 + 2(6 - 1)
a6 = 21 + 2(5)
a6 = 31