| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.37 |
| Score | 0% | 67% |
What is b6 x 5b5?
| 5b30 | |
| 5b11 | |
| 5b | |
| 5b5 |
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:
b6 x 5b5
(1 x 5)b(6 + 5)
5b11
Which of the following statements about exponents is false?
all of these are false |
|
b0 = 1 |
|
b1 = b |
|
b1 = 1 |
A number with an exponent (be) consists of a base (b) raised to a power (e). The exponent indicates the number of times that the base is multiplied by itself. A base with an exponent of 1 equals the base (b1 = b) and a base with an exponent of 0 equals 1 ( (b0 = 1).
A menswear store is having a sale: "Buy one shirt at full price and get another shirt for 10% off." If Roger buys two shirts, each with a regular price of $15, how much money will he save?
| $1.50 | |
| $2.25 | |
| $3.00 | |
| $6.00 |
By buying two shirts, Roger will save $15 x \( \frac{10}{100} \) = \( \frac{$15 x 10}{100} \) = \( \frac{$150}{100} \) = $1.50 on the second shirt.
Which of the following is a mixed number?
\({7 \over 5} \) |
|
\({5 \over 7} \) |
|
\(1 {2 \over 5} \) |
|
\({a \over 5} \) |
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 -x5 + 7x5?
| 6x-10 | |
| -8x5 | |
| 6x5 | |
| 6x10 |
To add or subtract terms with exponents, both the base and the exponent must be the same. In this case they are so add the coefficients and retain the base and exponent:
-1x5 + 7x5
(-1 + 7)x5
6x5