| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.28 |
| Score | 0% | 66% |
A bread recipe calls for 3\(\frac{5}{8}\) cups of flour. If you only have 1 cup, how much more flour is needed?
| 2\(\frac{5}{8}\) cups | |
| 1\(\frac{3}{4}\) cups | |
| \(\frac{5}{8}\) cups | |
| 2\(\frac{7}{8}\) cups |
The amount of flour you need is (3\(\frac{5}{8}\) - 1) cups. Rewrite the quantities so they share a common denominator and subtract:
(\( \frac{29}{8} \) - \( \frac{8}{8} \)) cups
\( \frac{21}{8} \) cups
2\(\frac{5}{8}\) cups
What is -4z4 - 6z4?
| 2z8 | |
| 2z4 | |
| -10z4 | |
| 2z16 |
To add or subtract terms with exponents, both the base and the exponent must be the same. In this case they are so subtract the coefficients and retain the base and exponent:
-4z4 - 6z4
(-4 - 6)z4
-10z4
The total water usage for a city is 40,000 gallons each day. Of that total, 27% is for personal use and 39% is for industrial use. How many more gallons of water each day is consumed for industrial use over personal use?
| 2,400 | |
| 5,100 | |
| 15,500 | |
| 4,800 |
39% of the water consumption is industrial use and 27% is personal use so (39% - 27%) = 12% more water is used for industrial purposes. 40,000 gallons are consumed daily so industry consumes \( \frac{12}{100} \) x 40,000 gallons = 4,800 gallons.
What is \( \frac{2}{6} \) x \( \frac{3}{8} \)?
| \(\frac{2}{9}\) | |
| \(\frac{1}{8}\) | |
| \(\frac{2}{27}\) | |
| 1 |
To multiply fractions, multiply the numerators together and then multiply the denominators together:
\( \frac{2}{6} \) x \( \frac{3}{8} \) = \( \frac{2 x 3}{6 x 8} \) = \( \frac{6}{48} \) = \(\frac{1}{8}\)
Which of the following is not a prime number?
7 |
|
9 |
|
5 |
|
2 |
A prime number is an integer greater than 1 that has no factors other than 1 and itself. Examples of prime numbers include 2, 3, 5, 7, and 11.