| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.10 |
| Score | 0% | 62% |
What is the next number in this sequence: 1, 7, 13, 19, 25, __________ ?
| 23 | |
| 28 | |
| 31 | |
| 38 |
The equation for this sequence is:
an = an-1 + 6
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 + 6
a6 = 25 + 6
a6 = 31
On average, the center for a basketball team hits 45% of his shots while a guard on the same team hits 60% of his shots. If the guard takes 25 shots during a game, how many shots will the center have to take to score as many points as the guard assuming each shot is worth the same number of points?
| 45 | |
| 33 | |
| 26 | |
| 27 |
guard shots made = shots taken x \( \frac{\text{% made}}{100} \) = 25 x \( \frac{60}{100} \) = \( \frac{60 x 25}{100} \) = \( \frac{1500}{100} \) = 15 shots
The center makes 45% of his shots so he'll have to take:
shots made = shots taken x \( \frac{\text{% made}}{100} \)
shots taken = \( \frac{\text{shots taken}}{\frac{\text{% made}}{100}} \)
to make as many shots as the guard. Plugging in values for the center gives us:
center shots taken = \( \frac{15}{\frac{45}{100}} \) = 15 x \( \frac{100}{45} \) = \( \frac{15 x 100}{45} \) = \( \frac{1500}{45} \) = 33 shots
to make the same number of shots as the guard and thus score the same number of points.
A factor is a positive __________ that divides evenly into a given number.
fraction |
|
improper fraction |
|
mixed number |
|
integer |
A factor is a positive integer that divides evenly into a given number. For example, the factors of 8 are 1, 2, 4, and 8.
What is \( \frac{9}{4} \) + \( \frac{7}{10} \)?
| 1 \( \frac{4}{13} \) | |
| 2 \( \frac{9}{12} \) | |
| 1 \( \frac{1}{4} \) | |
| 2\(\frac{19}{20}\) |
To add these fractions, first find the lowest common multiple of their denominators. The first few multiples of 4 are [4, 8, 12, 16, 20, 24, 28, 32, 36, 40] and the first few multiples of 10 are [10, 20, 30, 40, 50, 60, 70, 80, 90]. The first few multiples they share are [20, 40, 60, 80] making 20 the smallest multiple 4 and 10 share.
Next, convert the fractions so each denominator equals the lowest common multiple:
\( \frac{9 x 5}{4 x 5} \) + \( \frac{7 x 2}{10 x 2} \)
\( \frac{45}{20} \) + \( \frac{14}{20} \)
Now, because the fractions share a common denominator, you can add them:
\( \frac{45 + 14}{20} \) = \( \frac{59}{20} \) = 2\(\frac{19}{20}\)
What is \( 8 \)\( \sqrt{12} \) + \( 2 \)\( \sqrt{3} \)
| 18\( \sqrt{3} \) | |
| 16\( \sqrt{4} \) | |
| 10\( \sqrt{12} \) | |
| 10\( \sqrt{3} \) |
To add these radicals together their radicands must be the same:
8\( \sqrt{12} \) + 2\( \sqrt{3} \)
8\( \sqrt{4 \times 3} \) + 2\( \sqrt{3} \)
8\( \sqrt{2^2 \times 3} \) + 2\( \sqrt{3} \)
(8)(2)\( \sqrt{3} \) + 2\( \sqrt{3} \)
16\( \sqrt{3} \) + 2\( \sqrt{3} \)
Now that the radicands are identical, you can add them together:
16\( \sqrt{3} \) + 2\( \sqrt{3} \)