| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.86 |
| Score | 0% | 57% |
\({b + c \over a} = {b \over a} + {c \over a}\) defines which of the following?
commutative property for multiplication |
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distributive property for multiplication |
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distributive property for division |
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commutative property for division |
The distributive property for division helps in solving expressions like \({b + c \over a}\). It specifies that the result of dividing a fraction with multiple terms in the numerator and one term in the denominator can be obtained by dividing each term individually and then totaling the results: \({b + c \over a} = {b \over a} + {c \over a}\). For example, \({a^3 + 6a^2 \over a^2} = {a^3 \over a^2} + {6a^2 \over a^2} = a + 6\).
A menswear store is having a sale: "Buy one shirt at full price and get another shirt for 10% off." If Bob buys two shirts, each with a regular price of $19, how much will he pay for both shirts?
| $36.10 | |
| $24.70 | |
| $1.90 | |
| $17.10 |
By buying two shirts, Bob will save $19 x \( \frac{10}{100} \) = \( \frac{$19 x 10}{100} \) = \( \frac{$190}{100} \) = $1.90 on the second shirt.
So, his total cost will be
$19.00 + ($19.00 - $1.90)
$19.00 + $17.10
$36.10
A tiger in a zoo has consumed 88 pounds of food in 8 days. If the tiger continues to eat at the same rate, in how many more days will its total food consumtion be 154 pounds?
| 6 | |
| 13 | |
| 5 | |
| 12 |
If the tiger has consumed 88 pounds of food in 8 days that's \( \frac{88}{8} \) = 11 pounds of food per day. The tiger needs to consume 154 - 88 = 66 more pounds of food to reach 154 pounds total. At 11 pounds of food per day that's \( \frac{66}{11} \) = 6 more days.
If a rectangle is twice as long as it is wide and has a perimeter of 54 meters, what is the area of the rectangle?
| 32 m2 | |
| 128 m2 | |
| 72 m2 | |
| 162 m2 |
The area of a rectangle is width (w) x height (h). In this problem we know that the rectangle is twice as long as it is wide so h = 2w. The perimeter of a rectangle is 2w + 2h and we know that the perimeter of this rectangle is 54 meters so the equation becomes: 2w + 2h = 54.
Putting these two equations together and solving for width (w):
2w + 2h = 54
w + h = \( \frac{54}{2} \)
w + h = 27
w = 27 - h
From the question we know that h = 2w so substituting 2w for h gives us:
w = 27 - 2w
3w = 27
w = \( \frac{27}{3} \)
w = 9
Since h = 2w that makes h = (2 x 9) = 18 and the area = h x w = 9 x 18 = 162 m2
Damon loaned Jennifer $300 at an annual interest rate of 9%. If no payments are made, what is the total amount owed at the end of the first year?
| $327 | |
| $306 | |
| $309 | |
| $312 |
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 $300
i = 0.09 x $300
No payments were made so the total amount due is the original amount + the accumulated interest:
total = $300 + $27