Answer:
- Both expressions should be evaluated with two different values. If for each substituted value, the final values of the expressions are the same, then the two expressions must be equivalent.
Step-by-step explanation:
<u>Given expressions</u>
- 4x - x + 5 = 3x + 5
- 8 - 3x - 3 = -3x + 5
Compared, we see the expressions are different as 3x and -3x have different coefficient
<u>Answer options</u>
Both expressions should be evaluated with one value. If the final values of the expressions are both positive, then the two expressions must be equivalent.
- Incorrect. Positive outcome doesn't mean equivalent
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Both expressions should be evaluated with one value. If the final values of the expressions are the same, then the two expressions must be equivalent.
- Incorrect. There are 2 values- variable and constant
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Both expressions should be evaluated with two different values. If for each substituted value, the final values of the expressions are positive, then the two expressions must be equivalent.
- Incorrect. Positive outcome doesn't mean equivalent.
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Both expressions should be evaluated with two different values. If for each substituted value, the final values of the expressions are the same, then the two expressions must be equivalent.
Count on the numbers and then you'll get 10 as your answer
Answer:
It is expected that a boy will raise the flag 15 times
Step-by-step explanation:
If in the school there are the same number of boys and girls, when picking a random student, the probability of this student being a boy is 50% = 0.5.
So to find how many times it is expected that a boy will raise the flag over 30 days, we just need to multiply the total number of days by the probability of the student raising the flag each day being a boy:
30 * 0.5 = 15
It is expected that a boy will raise the flag 15 times.
