| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.20 |
| Score | 0% | 64% |
Roger loaned Frank $500 at an annual interest rate of 2%. If no payments are made, what is the interest owed on this loan at the end of the first year?
| $70 | |
| $112 | |
| $105 | |
| $10 |
The yearly interest charged on this loan is the annual interest rate multiplied by the amount borrowed:
interest = annual interest rate x loan amount
i = (\( \frac{6}{100} \)) x $500
i = 0.02 x $500
i = $10
On average, the center for a basketball team hits 40% of his shots while a guard on the same team hits 50% of his shots. If the guard takes 15 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?
| 35 | |
| 22 | |
| 13 | |
| 18 |
guard shots made = shots taken x \( \frac{\text{% made}}{100} \) = 15 x \( \frac{50}{100} \) = \( \frac{50 x 15}{100} \) = \( \frac{750}{100} \) = 7 shots
The center makes 40% 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 = \( \frac{7}{\frac{40}{100}} \) = 7 x \( \frac{100}{40} \) = \( \frac{7 x 100}{40} \) = \( \frac{700}{40} \) = 18 shots
to make the same number of shots as the guard and thus score the same number of points.
If \( \left|z - 1\right| \) + 6 = -4, which of these is a possible value for z?
| 15 | |
| -7 | |
| 0 | |
| -9 |
First, solve for \( \left|z - 1\right| \):
\( \left|z - 1\right| \) + 6 = -4
\( \left|z - 1\right| \) = -4 - 6
\( \left|z - 1\right| \) = -10
The value inside the absolute value brackets can be either positive or negative so (z - 1) must equal - 10 or --10 for \( \left|z - 1\right| \) to equal -10:
| z - 1 = -10 z = -10 + 1 z = -9 | z - 1 = 10 z = 10 + 1 z = 11 |
So, z = 11 or z = -9.
What is \( \frac{1}{9} \) ÷ \( \frac{4}{7} \)?
| \(\frac{4}{35}\) | |
| \(\frac{7}{36}\) | |
| \(\frac{1}{5}\) | |
| \(\frac{16}{49}\) |
To divide fractions, invert the second fraction and then multiply:
\( \frac{1}{9} \) ÷ \( \frac{4}{7} \) = \( \frac{1}{9} \) x \( \frac{7}{4} \)
To multiply fractions, multiply the numerators together and then multiply the denominators together:
\( \frac{1}{9} \) x \( \frac{7}{4} \) = \( \frac{1 x 7}{9 x 4} \) = \( \frac{7}{36} \) = \(\frac{7}{36}\)
What is the least common multiple of 5 and 7?
| 32 | |
| 10 | |
| 35 | |
| 2 |
The first few multiples of 5 are [5, 10, 15, 20, 25, 30, 35, 40, 45, 50] and the first few multiples of 7 are [7, 14, 21, 28, 35, 42, 49, 56, 63, 70]. The first few multiples they share are [35, 70] making 35 the smallest multiple 5 and 7 have in common.