| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.70 |
| Score | 0% | 54% |
A menswear store is having a sale: "Buy one shirt at full price and get another shirt for 15% off." If Charlie buys two shirts, each with a regular price of $44, how much will he pay for both shirts?
| $52.80 | |
| $6.60 | |
| $61.60 | |
| $81.40 |
By buying two shirts, Charlie will save $44 x \( \frac{15}{100} \) = \( \frac{$44 x 15}{100} \) = \( \frac{$660}{100} \) = $6.60 on the second shirt.
So, his total cost will be
$44.00 + ($44.00 - $6.60)
$44.00 + $37.40
$81.40
Simplify \( \sqrt{18} \)
| 7\( \sqrt{2} \) | |
| 2\( \sqrt{4} \) | |
| 5\( \sqrt{2} \) | |
| 3\( \sqrt{2} \) |
To simplify a radical, factor out the perfect squares:
\( \sqrt{18} \)
\( \sqrt{9 \times 2} \)
\( \sqrt{3^2 \times 2} \)
3\( \sqrt{2} \)
What is \( 5 \)\( \sqrt{125} \) - \( 9 \)\( \sqrt{5} \)
| -4\( \sqrt{625} \) | |
| 16\( \sqrt{5} \) | |
| 45\( \sqrt{625} \) | |
| -4\( \sqrt{0} \) |
To subtract these radicals together their radicands must be the same:
5\( \sqrt{125} \) - 9\( \sqrt{5} \)
5\( \sqrt{25 \times 5} \) - 9\( \sqrt{5} \)
5\( \sqrt{5^2 \times 5} \) - 9\( \sqrt{5} \)
(5)(5)\( \sqrt{5} \) - 9\( \sqrt{5} \)
25\( \sqrt{5} \) - 9\( \sqrt{5} \)
Now that the radicands are identical, you can subtract them:
25\( \sqrt{5} \) - 9\( \sqrt{5} \)On average, the center for a basketball team hits 35% of his shots while a guard on the same team hits 45% of his shots. If the guard takes 20 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?
| 26 | |
| 31 | |
| 21 | |
| 25 |
guard shots made = shots taken x \( \frac{\text{% made}}{100} \) = 20 x \( \frac{45}{100} \) = \( \frac{45 x 20}{100} \) = \( \frac{900}{100} \) = 9 shots
The center makes 35% 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 = \( \frac{9}{\frac{35}{100}} \) = 9 x \( \frac{100}{35} \) = \( \frac{9 x 100}{35} \) = \( \frac{900}{35} \) = 26 shots
to make the same number of shots as the guard and thus score the same number of points.
What is \( \frac{1}{8} \) ÷ \( \frac{2}{8} \)?
| \(\frac{8}{45}\) | |
| \(\frac{4}{27}\) | |
| \(\frac{1}{2}\) | |
| \(\frac{1}{24}\) |
To divide fractions, invert the second fraction and then multiply:
\( \frac{1}{8} \) ÷ \( \frac{2}{8} \) = \( \frac{1}{8} \) x \( \frac{8}{2} \)
To multiply fractions, multiply the numerators together and then multiply the denominators together:
\( \frac{1}{8} \) x \( \frac{8}{2} \) = \( \frac{1 x 8}{8 x 2} \) = \( \frac{8}{16} \) = \(\frac{1}{2}\)