| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.37 |
| Score | 0% | 67% |
What is 9\( \sqrt{2} \) x 4\( \sqrt{4} \)?
| 36\( \sqrt{2} \) | |
| 13\( \sqrt{4} \) | |
| 36\( \sqrt{4} \) | |
| 72\( \sqrt{2} \) |
To multiply terms with radicals, multiply the coefficients and radicands separately:
9\( \sqrt{2} \) x 4\( \sqrt{4} \)
(9 x 4)\( \sqrt{2 \times 4} \)
36\( \sqrt{8} \)
Now we need to simplify the radical:
36\( \sqrt{8} \)
36\( \sqrt{2 \times 4} \)
36\( \sqrt{2 \times 2^2} \)
(36)(2)\( \sqrt{2} \)
72\( \sqrt{2} \)
Betty scored 96% on her final exam. If each question was worth 4 points and there were 200 possible points on the exam, how many questions did Betty answer correctly?
| 52 | |
| 41 | |
| 48 | |
| 40 |
Betty scored 96% on the test meaning she earned 96% of the possible points on the test. There were 200 possible points on the test so she earned 200 x 0.96 = 192 points. Each question is worth 4 points so she got \( \frac{192}{4} \) = 48 questions right.
A bread recipe calls for 3\(\frac{1}{4}\) cups of flour. If you only have \(\frac{7}{8}\) cup, how much more flour is needed?
| 1\(\frac{3}{8}\) cups | |
| 1\(\frac{1}{2}\) cups | |
| 2\(\frac{5}{8}\) cups | |
| 2\(\frac{3}{8}\) cups |
The amount of flour you need is (3\(\frac{1}{4}\) - \(\frac{7}{8}\)) cups. Rewrite the quantities so they share a common denominator and subtract:
(\( \frac{26}{8} \) - \( \frac{7}{8} \)) cups
\( \frac{19}{8} \) cups
2\(\frac{3}{8}\) cups
What is the next number in this sequence: 1, 3, 5, 7, 9, __________ ?
| 13 | |
| 19 | |
| 7 | |
| 11 |
The equation for this sequence is:
an = an-1 + 2
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
a6 = 9 + 2
a6 = 11
4! = ?
5 x 4 x 3 x 2 x 1 |
|
4 x 3 |
|
3 x 2 x 1 |
|
4 x 3 x 2 x 1 |
A factorial has the form n! and is the product of the integer (n) and all the positive integers below it. For example, 5! = 5 x 4 x 3 x 2 x 1 = 120.