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shepuryov [24]
2 years ago
7

What is 4|x+9| divided by 5 is less than 8

Mathematics
1 answer:
RSB [31]2 years ago
3 0

Answer:

x < 1 and x > -19

Step-by-step explanation:

(4 |x+9|)/5<8

4 |x+9| < 40

|x+9| < 40/4

|x+9| < 10

x + 9 < 10. x < 1. (Positive answer: <)

x + 9 > - 10. x > - 19 (negative answer: >)

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3 years ago
Which is one reason why this expression is equal to 0?
Shtirlitz [24]
If there is no expression, it surely is equal to 0.
5 0
3 years ago
Read 2 more answers
The average systolic blood pressure was found to be 140 mm for people who have high responsibility jobs, specifically investment
defon

Answer:

t = -1.428

Step-by-step explanation:

Average blood pressure among people with high responsibility jobs = u = 140 mm

Number of people sampled for the study = n = 51

Average blood pressure of the sample = x = 139 mm

Standard deviation of the sample = s = 5 mm

The claim is that practicing yoga decreases the blood pressure. So we have to test that after practicing yoga, the average blood pressure will be lesser than 140. Based on this we can formulate the null and alternate hypothesis as:

Null Hypothesis: \mu \geq 140

Alternate Hypothesis: \mu < 140

Since population standard deviation is not known, we cannot use z-distribution for this test. We are given the value of sample standard deviation, so t-test will be used for this case.

Test statistic is calculated as:

t=\frac{x-u}{\frac{s}{\sqrt{n} } }

Using the values in this formula gives us:

t=\frac{139-140}{\frac{5}{\sqrt{51}}}\\\\ t=-1.428

Therefore, the value of test statistic is -1.428

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2 years ago
Hello, I need help. Just answers
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1 year ago
Jhon is making brownies for 48 of his family members. he can make 16 brownies from one package, and he expects everyone yo eat 2
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3 years ago
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