| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.41 |
| Score | 0% | 68% |
a(b + c) = ab + ac defines which of the following?
distributive property for multiplication |
|
distributive property for division |
|
commutative property for division |
|
commutative property for multiplication |
The distributive property for multiplication helps in solving expressions like a(b + c). It specifies that the result of multiplying one number by the sum or difference of two numbers can be obtained by multiplying each number individually and then totaling the results: a(b + c) = ab + ac. For example, 4(10-5) = (4 x 10) - (4 x 5) = 40 - 20 = 20.
A tiger in a zoo has consumed 10 pounds of food in 2 days. If the tiger continues to eat at the same rate, in how many more days will its total food consumtion be 45 pounds?
| 4 | |
| 7 | |
| 3 | |
| 8 |
If the tiger has consumed 10 pounds of food in 2 days that's \( \frac{10}{2} \) = 5 pounds of food per day. The tiger needs to consume 45 - 10 = 35 more pounds of food to reach 45 pounds total. At 5 pounds of food per day that's \( \frac{35}{5} \) = 7 more days.
Roger loaned Betty $200 at an annual interest rate of 1%. If no payments are made, what is the total amount owed at the end of the first year?
| $210 | |
| $212 | |
| $208 | |
| $202 |
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 $200
i = 0.01 x $200
No payments were made so the total amount due is the original amount + the accumulated interest:
total = $200 + $2Convert b-2 to remove the negative exponent.
| \( \frac{-1}{b^{-2}} \) | |
| \( \frac{-1}{-2b} \) | |
| \( \frac{1}{b^2} \) | |
| \( \frac{-2}{-b} \) |
To convert a negative exponent to a positive exponent, calculate the positive exponent then take the reciprocal.
What is \( \frac{1}{6} \) x \( \frac{2}{5} \)?
| \(\frac{1}{15}\) | |
| \(\frac{2}{25}\) | |
| \(\frac{1}{27}\) | |
| \(\frac{1}{6}\) |
To multiply fractions, multiply the numerators together and then multiply the denominators together:
\( \frac{1}{6} \) x \( \frac{2}{5} \) = \( \frac{1 x 2}{6 x 5} \) = \( \frac{2}{30} \) = \(\frac{1}{15}\)