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2 years ago

Can you solve number 7, number 8, and number 9

Mathematics

1 answer:

solmaris [256]2 years ago

5 0

Hello!

To solve each expression, you need to substitute the given value for each given variable. If there is an x in the expression, then you substitute 5.07. If there's a y, then you substitute 1.5, and if there's a z, then you substitute 0.403.

7. 3.2x + y (substitute x = 5.07 and y = 1.5)

3.2(5.07) + (1.5)

16.224 + 1.5

17.724

8. yz + x (substitute y = 1.5, z = 0.403, and x = 5.07)

(1.5)(0.403) + (5.07)

0.6045 + 5.07

5.6745

9. z × 7.06 - y (substitute z = 0.403 and y = 1.5)

(0.403) × 7.06 - (1.5)

2.84519 - 1.5

1.34518

Final answers:

Number 7: 17.724
Number 8: 5.6745
Number 9: 1.34518

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2 years ago

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3 years ago

What’s number 12 through 15 pls I need this ASAP

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3 years ago

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Answer:

We conclude that the mean nicotine content is less than 31.7 milligrams for this brand of cigarette.

Step-by-step explanation:

We are given the following in the question:

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Alpha, α = 0.05

Sample standard deviation, s = 2.8 milligrams

First, we design the null and the alternate hypothesis

$H_{0}: \mu = 31.7\text{ milligrams}\\H_A: \mu < 31.7\text{ milligrams}$

We use One-tailed t test to perform this hypothesis.

Formula:

$t_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{s}{\sqrt{n}} }$

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Now, $t_{critical} \text{ at 0.05 level of significance, 8 degree of freedom } = -1.860$

Since,

$t_{stat} < t_{critical}$

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3 years ago

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