| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.55 |
| Score | 0% | 71% |
What is 2a6 - 7a6?
| 9a36 | |
| 5a-6 | |
| -5a6 | |
| 9a6 |
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:
2a6 - 7a6
(2 - 7)a6
-5a6
Find the average of the following numbers: 9, 7, 10, 6.
| 8 | |
| 13 | |
| 5 | |
| 7 |
To find the average of these 4 numbers add them together then divide by 4:
\( \frac{9 + 7 + 10 + 6}{4} \) = \( \frac{32}{4} \) = 8
Which of the following is not an integer?
\({1 \over 2}\) |
|
-1 |
|
0 |
|
1 |
An integer is any whole number, including zero. An integer can be either positive or negative. Examples include -77, -1, 0, 55, 119.
Which of the following is not a prime number?
2 |
|
5 |
|
9 |
|
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.
What is the next number in this sequence: 1, 3, 7, 13, 21, __________ ?
| 23 | |
| 31 | |
| 28 | |
| 38 |
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