| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.24 |
| Score | 0% | 65% |
If \( \left|y + 9\right| \) + 5 = 2, which of these is a possible value for y?
| 6 | |
| -19 | |
| -6 | |
| 12 |
First, solve for \( \left|y + 9\right| \):
\( \left|y + 9\right| \) + 5 = 2
\( \left|y + 9\right| \) = 2 - 5
\( \left|y + 9\right| \) = -3
The value inside the absolute value brackets can be either positive or negative so (y + 9) must equal - 3 or --3 for \( \left|y + 9\right| \) to equal -3:
| y + 9 = -3 y = -3 - 9 y = -12 | y + 9 = 3 y = 3 - 9 y = -6 |
So, y = -6 or y = -12.
A tiger in a zoo has consumed 135 pounds of food in 9 days. If the tiger continues to eat at the same rate, in how many more days will its total food consumtion be 195 pounds?
| 10 | |
| 4 | |
| 2 | |
| 7 |
If the tiger has consumed 135 pounds of food in 9 days that's \( \frac{135}{9} \) = 15 pounds of food per day. The tiger needs to consume 195 - 135 = 60 more pounds of food to reach 195 pounds total. At 15 pounds of food per day that's \( \frac{60}{15} \) = 4 more days.
Solve for \( \frac{2!}{3!} \)
| 6720 | |
| \( \frac{1}{5} \) | |
| \( \frac{1}{3} \) | |
| 60480 |
A factorial is the product of an integer and all the positive integers below it. To solve a fraction featuring factorials, expand the factorials and cancel out like numbers:
\( \frac{2!}{3!} \)
\( \frac{2 \times 1}{3 \times 2 \times 1} \)
\( \frac{1}{3} \)
\( \frac{1}{3} \)
a(b + c) = ab + ac defines which of the following?
distributive property for multiplication |
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distributive property for division |
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commutative property for division |
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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.
Which of the following is not a prime number?
2 |
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7 |
|
9 |
|
5 |
A prime number is an integer greater than 1 that has no factors other than 1 and itself. Examples of prime numbers include 2, 3, 5, 7, and 11.