| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.56 |
| Score | 0% | 71% |
Which of the following is not an integer?
0 |
|
-1 |
|
1 |
|
\({1 \over 2}\) |
An integer is any whole number, including zero. An integer can be either positive or negative. Examples include -77, -1, 0, 55, 119.
A bread recipe calls for 2\(\frac{1}{2}\) cups of flour. If you only have \(\frac{7}{8}\) cup, how much more flour is needed?
| 2\(\frac{1}{2}\) cups | |
| 1\(\frac{5}{8}\) cups | |
| \(\frac{5}{8}\) cups | |
| 1\(\frac{1}{4}\) cups |
The amount of flour you need is (2\(\frac{1}{2}\) - \(\frac{7}{8}\)) cups. Rewrite the quantities so they share a common denominator and subtract:
(\( \frac{20}{8} \) - \( \frac{7}{8} \)) cups
\( \frac{13}{8} \) cups
1\(\frac{5}{8}\) cups
Which of the following is an improper fraction?
\({2 \over 5} \) |
|
\(1 {2 \over 5} \) |
|
\({a \over 5} \) |
|
\({7 \over 5} \) |
A rational number (or fraction) is represented as a ratio between two integers, a and b, and has the form \({a \over b}\) where a is the numerator and b is the denominator. An improper fraction (\({5 \over 3} \)) has a numerator with a greater absolute value than the denominator and can be converted into a mixed number (\(1 {2 \over 3} \)) which has a whole number part and a fractional part.
What is \( \frac{9c^5}{7c^4} \)?
| 1\(\frac{2}{7}\)c1\(\frac{1}{4}\) | |
| 1\(\frac{2}{7}\)c | |
| 1\(\frac{2}{7}\)c9 | |
| 1\(\frac{2}{7}\)c\(\frac{4}{5}\) |
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:
\( \frac{9c^5}{7c^4} \)
\( \frac{9}{7} \) c(5 - 4)
1\(\frac{2}{7}\)c
4! = ?
4 x 3 x 2 x 1 |
|
4 x 3 |
|
3 x 2 x 1 |
|
5 x 4 x 3 x 2 x 1 |
A factorial has the form n! and is the product of the integer (n) and all the positive integers below it. For example, 5! = 5 x 4 x 3 x 2 x 1 = 120.