| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.31 |
| Score | 0% | 66% |
What is -6y4 x 2y6?
| -4y4 | |
| -12y10 | |
| -12y24 | |
| -4y24 |
To multiply terms with exponents, the base of both exponents must be the same. In this case they are so multiply the coefficients and add the exponents:
-6y4 x 2y6
(-6 x 2)y(4 + 6)
-12y10
The total water usage for a city is 30,000 gallons each day. Of that total, 10% is for personal use and 25% is for industrial use. How many more gallons of water each day is consumed for industrial use over personal use?
| 3,600 | |
| 4,500 | |
| 600 | |
| 1,400 |
25% of the water consumption is industrial use and 10% is personal use so (25% - 10%) = 15% more water is used for industrial purposes. 30,000 gallons are consumed daily so industry consumes \( \frac{15}{100} \) x 30,000 gallons = 4,500 gallons.
A triathlon course includes a 100m swim, a 50.4km bike ride, and a 3.4000000000000004km run. What is the total length of the race course?
| 53.9km | |
| 49.4km | |
| 41.7km | |
| 29.3km |
To add these distances, they must share the same unit so first you need to first convert the swim distance from meters (m) to kilometers (km) before adding it to the bike and run distances which are already in km. To convert 100 meters to kilometers, divide the distance by 1000 to get 0.1km then add the remaining distances:
total distance = swim + bike + run
total distance = 0.1km + 50.4km + 3.4000000000000004km
total distance = 53.9km
If a mayor is elected with 56% of the votes cast and 48% of a town's 47,000 voters cast a vote, how many votes did the mayor receive?
| 12,634 | |
| 15,341 | |
| 15,792 | |
| 18,725 |
If 48% of the town's 47,000 voters cast ballots the number of votes cast is:
(\( \frac{48}{100} \)) x 47,000 = \( \frac{2,256,000}{100} \) = 22,560
The mayor got 56% of the votes cast which is:
(\( \frac{56}{100} \)) x 22,560 = \( \frac{1,263,360}{100} \) = 12,634 votes.
Which of the following is not an integer?
\({1 \over 2}\) |
|
0 |
|
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.