| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.23 |
| Score | 0% | 65% |
A tiger in a zoo has consumed 30 pounds of food in 6 days. If the tiger continues to eat at the same rate, in how many more days will its total food consumtion be 45 pounds?
| 3 | |
| 7 | |
| 8 | |
| 5 |
If the tiger has consumed 30 pounds of food in 6 days that's \( \frac{30}{6} \) = 5 pounds of food per day. The tiger needs to consume 45 - 30 = 15 more pounds of food to reach 45 pounds total. At 5 pounds of food per day that's \( \frac{15}{5} \) = 3 more days.
What is the next number in this sequence: 1, 4, 10, 19, 31, __________ ?
| 44 | |
| 49 | |
| 47 | |
| 46 |
The equation for this sequence is:
an = an-1 + 3(n - 1)
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 + 3(6 - 1)
a6 = 31 + 3(5)
a6 = 46
What is \( \frac{7y^8}{4y^3} \)?
| 1\(\frac{3}{4}\)y5 | |
| 1\(\frac{3}{4}\)y24 | |
| 1\(\frac{3}{4}\)y11 | |
| \(\frac{4}{7}\)y5 |
To divide terms with exponents, the base of both exponents must be the same. In this case they are so divide the coefficients and subtract the exponents:
\( \frac{7y^8}{4y^3} \)
\( \frac{7}{4} \) y(8 - 3)
1\(\frac{3}{4}\)y5
What is \( \frac{4}{2} \) + \( \frac{9}{8} \)?
| \( \frac{5}{12} \) | |
| 3\(\frac{1}{8}\) | |
| 1 \( \frac{1}{6} \) | |
| 1 \( \frac{7}{8} \) |
To add these fractions, first find the lowest common multiple of their denominators. The first few multiples of 2 are [2, 4, 6, 8, 10, 12, 14, 16, 18, 20] and the first few multiples of 8 are [8, 16, 24, 32, 40, 48, 56, 64, 72, 80]. The first few multiples they share are [8, 16, 24, 32, 40] making 8 the smallest multiple 2 and 8 share.
Next, convert the fractions so each denominator equals the lowest common multiple:
\( \frac{4 x 4}{2 x 4} \) + \( \frac{9 x 1}{8 x 1} \)
\( \frac{16}{8} \) + \( \frac{9}{8} \)
Now, because the fractions share a common denominator, you can add them:
\( \frac{16 + 9}{8} \) = \( \frac{25}{8} \) = 3\(\frac{1}{8}\)
Which of the following is not an integer?
0 |
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\({1 \over 2}\) |
|
1 |
|
-1 |
An integer is any whole number, including zero. An integer can be either positive or negative. Examples include -77, -1, 0, 55, 119.