Answer:
x = 15
Step-by-step explanation:
2.25x - 10 = 23.75
Add 10 to both sides
2.25x = 33.75
Divide both sides by 2.25
x = 15
8,7,9,3,4,9,2
This is correct because I’m in middle school
Answer:
x-(2-0)
Step-by-step explanation:
First box is -2x
Second is 0/2
False
on the left, there is 2 negatives, which cannot result in a negative number on the right
First, find the z-score:
z = (value - mean) / sdev
= (275 - 280) / 15
= - 0.33
In order to use a standard normal table, we need a positive z-score:
P(z < -0.33) = 1 - P(z < 0.33)
Looking at the table, we find P(z < 0.33) = 0.6293
Therefore:
P(z < -0.33) = 1 - 0.6293 = 0.3707
Hence, you have a probability of about 37% <span>that a randomly selected pregnancy lasts less than 275 days.</span>