If two opposite sides of a square are increased by 8 meters and the other sides are decreased by 5 meters, the area of the recta
1 answer:
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Answer:
First option:
Second option:
Fourth option:
Step-by-step explanation:
Rewrite each equation in the form and then use the Discriminant formula for each equation. This is:
1) For :
Then:
Since this equation has no real solutions, but has two complex solutions.
2) For :
Then:
Since this equation has no real solutions, but has two complex solutions.
3) For :
Then:
Since this equation has one real solution.
4) For :
Then:
Since , this equation has no real solutions, but has two complex solutions.
Answer:
-1
Step-by-step explanation:
Given: Mean= 25 minutes.
Standard deviation= 2 minutes
x= 23 minutes.
Lets find the z-score for the number of sandwiches delivered in less than 23 mins.
Formula: Z-score=
Z-score=
⇒ Z-score=
∴ Z-score will be -1
Hence, -1 is the z-score for the number of sandwiches delivered in less than 23 minutes.