Answer:
7(a +6)
Step-by-step explanation:
7 is a factor of both terms, so we can factor that out.
42 +7a = 7·6 +7·a = 7(6 +a)
Complete Question
The complete question is shown on the first uploaded image
Answer:
The value is
Step-by-step explanation:
From the question we are told to obtain the area to the of the z-score 1.39 and to the left of the z-score 1.53, this is mathematically represented as
From the z table on the question the area under the normal curve to the left corresponding to 1.53 and 1.39 is
and
So
=>
Answer:
So, the probability is P=0.27.
Step-by-step explanation:
We know that the mean of computer chips is 1 centimeter and a standard deviation of 0.1 centimeter. A random sample of 12 computer chips is taken.
We get:
We calculate:
We use a table for standard normal distribution, and we calculate the probability:
So, the probability is P=0.27.