Answer:
X = 65 degrees
Step-by-step explanation:
180 = 70 + 45 + X
180 = 115 + X
X = 65 degrees
Answer: 8(x-4) 8 was the common term. So just pull out the 8.
Answer:
((1 × 2) + 3) × 4 × 5 + 6 - 7 - 8 + 9 = 100
Step-by-step explanation:
((1 × 2) + 3) × 4 × 5 + 6 - 7 - 8 + 9 = 100
= (2+3) x 4 x 5 + 6 - 7 - 8 + 9
= 5 x 4 x 5 + 6 - 7 - 8 + 9
= 100 + 6 - 7 - 8 + 9
= 115 - 7 - 8
= 115 - 15
= 100
Answer:

And for this case we know this condition:

By the complement rule we know that:

But since the distribution is symmetrical we know that:

So then the statement for this case is FALSE.
b. False
Step-by-step explanation:
Previous concepts
Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".
The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".
Solution to the problem
For this case if we define the random variable of interest X and we know that this random variable follows a normal distribution:

And for this case we know this condition:

By the complement rule we know that:

But since the distribution is symmetrical we know that:

So then the statement for this case is FALSE.
b. False