| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.87 |
| Score | 0% | 57% |
What is \( 6 \)\( \sqrt{12} \) + \( 7 \)\( \sqrt{3} \)
| 42\( \sqrt{4} \) | |
| 19\( \sqrt{3} \) | |
| 13\( \sqrt{3} \) | |
| 42\( \sqrt{3} \) |
To add these radicals together their radicands must be the same:
6\( \sqrt{12} \) + 7\( \sqrt{3} \)
6\( \sqrt{4 \times 3} \) + 7\( \sqrt{3} \)
6\( \sqrt{2^2 \times 3} \) + 7\( \sqrt{3} \)
(6)(2)\( \sqrt{3} \) + 7\( \sqrt{3} \)
12\( \sqrt{3} \) + 7\( \sqrt{3} \)
Now that the radicands are identical, you can add them together:
12\( \sqrt{3} \) + 7\( \sqrt{3} \)A tiger in a zoo has consumed 26 pounds of food in 2 days. If the tiger continues to eat at the same rate, in how many more days will its total food consumtion be 117 pounds?
| 8 | |
| 7 | |
| 1 | |
| 9 |
If the tiger has consumed 26 pounds of food in 2 days that's \( \frac{26}{2} \) = 13 pounds of food per day. The tiger needs to consume 117 - 26 = 91 more pounds of food to reach 117 pounds total. At 13 pounds of food per day that's \( \frac{91}{13} \) = 7 more days.
What is \( \frac{1}{8} \) x \( \frac{2}{5} \)?
| \(\frac{1}{20}\) | |
| \(\frac{2}{35}\) | |
| \(\frac{2}{9}\) | |
| \(\frac{4}{15}\) |
To multiply fractions, multiply the numerators together and then multiply the denominators together:
\( \frac{1}{8} \) x \( \frac{2}{5} \) = \( \frac{1 x 2}{8 x 5} \) = \( \frac{2}{40} \) = \(\frac{1}{20}\)
Which of the following is not an integer?
-1 |
|
\({1 \over 2}\) |
|
0 |
|
1 |
An integer is any whole number, including zero. An integer can be either positive or negative. Examples include -77, -1, 0, 55, 119.
Cooks are needed to prepare for a large party. Each cook can bake either 4 large cakes or 19 small cakes per hour. The kitchen is available for 4 hours and 37 large cakes and 480 small cakes need to be baked.
How many cooks are required to bake the required number of cakes during the time the kitchen is available?
| 15 | |
| 13 | |
| 6 | |
| 10 |
If a single cook can bake 4 large cakes per hour and the kitchen is available for 4 hours, a single cook can bake 4 x 4 = 16 large cakes during that time. 37 large cakes are needed for the party so \( \frac{37}{16} \) = 2\(\frac{5}{16}\) cooks are needed to bake the required number of large cakes.
If a single cook can bake 19 small cakes per hour and the kitchen is available for 4 hours, a single cook can bake 19 x 4 = 76 small cakes during that time. 480 small cakes are needed for the party so \( \frac{480}{76} \) = 6\(\frac{6}{19}\) cooks are needed to bake the required number of small cakes.
Because you can't employ a fractional cook, round the number of cooks needed for each type of cake up to the next whole number resulting in 3 + 7 = 10 cooks.