1. The area of a square with side length x, where the side length is decreased by 3, the area is
1 answer:
Answer:
Step-by-step explanation:
Let's follow what the problem asks us:
- "The area of a square with side length x"
this is the formula for area:
since the side length is x, the initial area is:
- Now, "where the side length is decreased by 3":
The side is now , thus the area is:
- "the area is multiplied by 2"
we had the area , when we multiply by 2:
- And finally " then 4 square units are added to the area."
this is:
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Answer:
Yes
Step-by-step explanation:
the function that gives the alcohol level is:
where x is the number of hours.
we need to know if after 4 hours an average person is legally drunk, thus:
and we substitute this in the function:
solving these operations we obtain:
the alcohol level after 4 hours is 3.24.
Since a person is considered to be legally drunk if the level exceeds 1.5, and we obtained 3.24 which is greater than 1.5, a person who has been drinking for 4 hours under the conditions indicated by the problem would be considered legally drunk.