Answer:
x<1
Step-by-step explanation:
10x + 80 < 90
10x < 90 - 80
10x < 10
x < 1
Answer:
(-3,2)
Step-by-step explanation:
If it moved 3 units left, that means the new point's x-coordinate is -3.
If it moved 2 units up, that means the new point's y-coordinate is 2.
Therefore, if the new point's x-coordinate is -3 and y-coordinate is 2, we can represent the point as (-3,2)
Answer:
95.15%
Step-by-step explanation:
We have that the mean (m) is equal to 20, the standard deviation (sd) 3
They ask us for P (x <25)
For this, the first thing is to calculate z, which is given by the following equation:
z = (x - m) / sd
We have all these values, replacing we have:
z = (25 - 20) / (3)
z = 1.66
With the normal distribution table (attached), we have that at that value, the probability is:
P (z <1.66) = 0.9515
Which means that the probability that it arrives before 25 minutes is 95.15%
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