| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.52 |
| Score | 0% | 70% |
What is -2c7 x 4c7?
| -8c14 | |
| -8c49 | |
| 2c7 | |
| 2c14 |
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:
-2c7 x 4c7
(-2 x 4)c(7 + 7)
-8c14
Which of these numbers is a factor of 32?
| 24 | |
| 4 | |
| 27 | |
| 9 |
The factors of a number are all positive integers that divide evenly into the number. The factors of 32 are 1, 2, 4, 8, 16, 32.
A menswear store is having a sale: "Buy one shirt at full price and get another shirt for 30% off." If Monty buys two shirts, each with a regular price of $30, how much will he pay for both shirts?
| $36.00 | |
| $9.00 | |
| $21.00 | |
| $51.00 |
By buying two shirts, Monty will save $30 x \( \frac{30}{100} \) = \( \frac{$30 x 30}{100} \) = \( \frac{$900}{100} \) = $9.00 on the second shirt.
So, his total cost will be
$30.00 + ($30.00 - $9.00)
$30.00 + $21.00
$51.00
What is (x2)5?
| x10 | |
| x-3 | |
| 5x2 | |
| x7 |
To raise a term with an exponent to another exponent, retain the base and multiply the exponents:
(x2)5Damon loaned Charlie $700 at an annual interest rate of 4%. If no payments are made, what is the interest owed on this loan at the end of the first year?
| $12 | |
| $28 | |
| $21 | |
| $77 |
The yearly interest charged on this loan is the annual interest rate multiplied by the amount borrowed:
interest = annual interest rate x loan amount
i = (\( \frac{6}{100} \)) x $700
i = 0.04 x $700
i = $28