| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.16 |
| Score | 0% | 63% |
Betty scored 95% on her final exam. If each question was worth 2 points and there were 80 possible points on the exam, how many questions did Betty answer correctly?
| 51 | |
| 38 | |
| 40 | |
| 48 |
Betty scored 95% on the test meaning she earned 95% of the possible points on the test. There were 80 possible points on the test so she earned 80 x 0.95 = 76 points. Each question is worth 2 points so she got \( \frac{76}{2} \) = 38 questions right.
A menswear store is having a sale: "Buy one shirt at full price and get another shirt for 5% off." If Frank buys two shirts, each with a regular price of $38, how much money will he save?
| $3.80 | |
| $13.30 | |
| $1.90 | |
| $7.60 |
By buying two shirts, Frank will save $38 x \( \frac{5}{100} \) = \( \frac{$38 x 5}{100} \) = \( \frac{$190}{100} \) = $1.90 on the second shirt.
| 2.8 | |
| 1 | |
| 3.0 | |
| 4.2 |
1
If \(\left|a\right| = 7\), which of the following best describes a?
a = 7 |
|
none of these is correct |
|
a = 7 or a = -7 |
|
a = -7 |
The absolute value is the positive magnitude of a particular number or variable and is indicated by two vertical lines: \(\left|-5\right| = 5\). In the case of a variable absolute value (\(\left|a\right| = 5\)) the value of a can be either positive or negative (a = -5 or a = 5).
What is the next number in this sequence: 1, 4, 10, 19, 31, __________ ?
| 51 | |
| 46 | |
| 47 | |
| 39 |
The equation for this sequence is:
an = an-1 + 3(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 + 3(6 - 1)
a6 = 31 + 3(5)
a6 = 46