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3 years ago

How many ounces of pure gold and a 16 carry the old change and it weighs 2.5 ounces

Mathematics

1 answer:

sladkih [1.3K]3 years ago

5 0

Make sure the question is stated clearly

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Slope intercept of 5x+2y= -2

Marianna [84]

Answer:

Step-by-step explanation:

5x + 2y = - 2

2y = - 5x - 2

y = $-\frac{5}{2}$ x - 1

5 0

3 years ago

A professor thinks that the students in her statistics class this term are less creative than most students at this university.

choli [55]

Answer:

It is not enough evidence to reject null hypothesis. It is not enough evidence to say that mean score is not equal to 35.

Step-by-step explanation:

$\mu=35\\n=23\\\=x=33\\s=5\\\alpha=0.1$

1. Null and alternative hypothesis

$H_{0}:\mu=35\\H_{1}:\mu$

2. Significance level

$\alpha=0.1\\1-\alpha=0.99$

Freedom degrees is given by:

$v=n-1\\v=23-1=22$

For a sgnificance level of 0,01 and 22 freedom degrees, t-student distribution value is:

$t_{0.01;23}=-2. 5083$

3. Test statistic

$t=\frac{\=x-\mu}{\frac{s}{\sqrt{n} } }$

$t=\frac{33-35}{\frac{5}{\sqrt{23} } }$

$t=-1,918$

In this case, we have an one left tailed analysis, it means that null hypothesis is rejected if $t$

$-1.918>-2.5083$

Conclusion:

It is not enough evidence to reject null hypothesis. It is not enough evidence to say that mean score is not equal to 35.

3 0

3 years ago

Drew replaces the light bulb in the hall closet every 9 months and replaces the air filter every 6 months. He just replaced both

natita [175]

The 18th month he will have to change both,
I hope this helped!

4 0

3 years ago

Read 2 more answers

Find the area of the triangle if A=1/2bh

Yanka [14]

A= 12x-4(3x+2)/2. 36x2+24x-12x-8. 36x2+12x-8/2. 18x2+6x-4.

5 0

3 years ago

Read 2 more answers

Write the expression (−2)·(−2)·7·7·7·7·7 using exponents.

NeTakaya

Answer: $(-2)^{2}*7^{5}$

Step-by-step explanation:

You have to group all of the same one's together and however many there is, you add that number as the exponent.

There were 2 "(-2)" so that became $(-2)^{2}$ , and there were 5 "7" so that became $7^{5}$ . You keep the symbol and put it together which became $(-2)^{2}*7^{5}$

5 0

2 years ago