| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 4.02 |
| Score | 0% | 80% |
Which of the following is a mixed number?
\({a \over 5} \) |
|
\(1 {2 \over 5} \) |
|
\({5 \over 7} \) |
|
\({7 \over 5} \) |
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.
A menswear store is having a sale: "Buy one shirt at full price and get another shirt for 10% off." If Damon buys two shirts, each with a regular price of $25, how much money will he save?
| $6.25 | |
| $2.50 | |
| $8.75 | |
| $5.00 |
By buying two shirts, Damon will save $25 x \( \frac{10}{100} \) = \( \frac{$25 x 10}{100} \) = \( \frac{$250}{100} \) = $2.50 on the second shirt.
What is 6y7 - 7y7?
| -y-7 | |
| 13y49 | |
| 13y14 | |
| -y7 |
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:
6y7 - 7y7
(6 - 7)y7
-y7
What is the next number in this sequence: 1, 5, 9, 13, 17, __________ ?
| 15 | |
| 21 | |
| 18 | |
| 27 |
The equation for this sequence is:
an = an-1 + 4
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 + 4
a6 = 17 + 4
a6 = 21
If a car travels 30 miles in 1 hour, what is the average speed?
| 30 mph | |
| 75 mph | |
| 65 mph | |
| 45 mph |
Average speed in miles per hour is the number of miles traveled divided by the number of hours:
speed = \( \frac{\text{distance}}{\text{time}} \)