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Ber [7]
2 years ago
12

Y=4x. Y=40. What does x equal

Mathematics
2 answers:
kotegsom [21]2 years ago
7 0
Y=4x
40=4x
40/4=10
x=10
egoroff_w [7]2 years ago
4 0

Answer:

Your answer is 10!

Y = 4x

(40) = 4x

40 = 4(10)

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Researchers fed mice a specific amount of Toxaphene, a poisonous pesticide, and studied their nervous systems to find out why To
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Answer:

a. The mean refractory period= 1.85 and the standard error = 0.06455

b.  90% confidence interval for the mean absolute refractory period for all mice when subjected to the same treatment = 1.6981, 2.0019

c. Yes, the data give good evidence to support this theory

Step-by-step explanation:

a.  The table below shows the calculations:

                 X                (X-mean)^2

                1.7             0.0225

                1.8                 0.0025

                1.9                 0.0025

                2.0                 0.0225

Total        7.4                  0.05

Sample size: n=4

The mean is:  \bar{x} = \frac{7.4}{4} = 1.85

The sample standard deviation, s = \sqrt{\frac{\sum \left ( x-\bar{x} \right )^{2}}{n-1}}=0.1291

The standard error, se= \frac{s}{\sqrt{n}}=\frac{0.1291}{2} = 0.06455

b. Degree of freedom: df = n-1 = 3

Critical value of t for 90% confidence interval is: 2.3534

The confidence interval is  \bar{x}\pm t_{c}se = 1.85\pm 2.3534\cdot 0.06455=1.85\pm 0.1519 = (1.6981, 2.0019)

c. The Hypotheses are:

H_{0}:\mu=1.3,H_{1}:\mu>1.3

So the test statistics will be

t=\frac{\bar{x}-\mu}{s/\sqrt{n}}=8.52

The p-value is: 0.0017

We reject the null hypothesis because p-value is less than 0.05 . This indicates that the data gave good evidence to support this theory.

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3 years ago
You work with 3 other students on a project for science class. Your group
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Answer:

350 points are possible

Step-by-step explanation:

You take 329 divided by 94% or .94 to get 350.

100% of 350 is 350

To double check, 94% of 350 is 329 & 6% of 350 is 21.  329 +21 = 350

4 0
2 years ago
How can I make liters into deciliters?
Mila [183]

Answer:

Multiply liters by 10.

1 liters= 10 deciliters

5 0
3 years ago
Which of the following expressions has a value of 3? -6 divided -2, 4 -(-1),(-1)(-3), (-2) - 1, 15 divided by -5, 4 + 1
pav-90 [236]

Answer:

(-1)(-3)

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Answer:

1st one:

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Step-by-step explanation:

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