Li is making beaded necklaces. for each necklace, she uses 25 spacers, plus 9 beads per inch of necklace length. write an equati
1 answer:
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Answer:
The third reading must be between 6.3 and 8.1 inclusive.
Step-by-step explanation:
To find the average of three numbers, add the three numbers and divide by 3.
Let the third reading = p.
The average of the three readings is
This average must be between 7.2 and 7.8 inclusive. "Inclusive" means that the values 7.2 and 7.8 are allowed. That means the average must be greater than or equal to 7.2 and less than or equal to 7.8. We can write this as the following inequality.
Simplify the numerator.
Multiply the three sides by 3.
Subtract 15.3 from the three sides.
Answer: The third reading must be between 6.3 and 8.1 inclusive.
Answer:
A
Step-by-step explanation:
There's no solution. It is the first one already. There is no number that is both greater than 14 and less than or equal to -4. That is no solution because there's no that satisfy the compound inequality.
<u>Note: the signal change because we divided by negative number.</u>
