| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.14 |
| Score | 0% | 63% |
If a mayor is elected with 74% of the votes cast and 67% of a town's 21,000 voters cast a vote, how many votes did the mayor receive?
| 10,412 | |
| 12,382 | |
| 11,397 | |
| 12,663 |
If 67% of the town's 21,000 voters cast ballots the number of votes cast is:
(\( \frac{67}{100} \)) x 21,000 = \( \frac{1,407,000}{100} \) = 14,070
The mayor got 74% of the votes cast which is:
(\( \frac{74}{100} \)) x 14,070 = \( \frac{1,041,180}{100} \) = 10,412 votes.
What is the greatest common factor of 76 and 24?
| 4 | |
| 1 | |
| 21 | |
| 20 |
The factors of 76 are [1, 2, 4, 19, 38, 76] and the factors of 24 are [1, 2, 3, 4, 6, 8, 12, 24]. They share 3 factors [1, 2, 4] making 4 the greatest factor 76 and 24 have in common.
If \( \left|c + 5\right| \) + 6 = 8, which of these is a possible value for c?
| -6 | |
| 6 | |
| -7 | |
| 10 |
First, solve for \( \left|c + 5\right| \):
\( \left|c + 5\right| \) + 6 = 8
\( \left|c + 5\right| \) = 8 - 6
\( \left|c + 5\right| \) = 2
The value inside the absolute value brackets can be either positive or negative so (c + 5) must equal + 2 or -2 for \( \left|c + 5\right| \) to equal 2:
| c + 5 = 2 c = 2 - 5 c = -3 | c + 5 = -2 c = -2 - 5 c = -7 |
So, c = -7 or c = -3.
What is (y2)4?
| y8 | |
| y6 | |
| y-2 | |
| y2 |
To raise a term with an exponent to another exponent, retain the base and multiply the exponents:
(y2)4Which of the following statements about exponents is false?
all of these are false |
|
b1 = 1 |
|
b0 = 1 |
|
b1 = b |
A number with an exponent (be) consists of a base (b) raised to a power (e). The exponent indicates the number of times that the base is multiplied by itself. A base with an exponent of 1 equals the base (b1 = b) and a base with an exponent of 0 equals 1 ( (b0 = 1).