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2 years ago

−16.2=x−(−9.3) HELLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLPP

Mathematics

2 answers:

Brilliant_brown [7]2 years ago

8 0

x = -25.5

Happy To Help ;)

Step-by-step explanation:

brilliants [131]2 years ago

5 0

Answer:

= − 2 5 . 5

Step-by-step explanation:

If you want a step by step explanation jsut ask

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Expand the polynomial (x2 − y2)2 + (2xy)2, then simplify it by combining like terms.

Vlada [557]

2x^2+4xy−2y^2
hope this helps

8 0

3 years ago

Y = -x + 3 What is the slope for this?

ICE Princess25 [194]

The slope for this equation is x=3

5 0

3 years ago

3.16 x 10 with the power of 3

DENIUS [597]

Answer:

3160

Step-by-step explanation:

3.16 x 10^3

10^3 = 1000

so you move the decimal point three times to the right

I hope this helps

8 0

3 years ago

Read 2 more answers

The senior class had a car wash to raise money for the senior trip. It cost them $35 for supplies. They washed 75 cars and charg

nikitadnepr [17]

Answer:

C. 75 • $6 - $35

Step-by-step explanation:

First, 75 times 6 needs to be in the expression to represent how much they raised from washing the 75 cars.

Then, 35 has to be subtracted because that was the cost of the supplies:

So, C is correct, 75 • $6 - $35

5 0

3 years ago

Read 2 more answers

Grades on a standardized test are known to have a mean of 1000 for students in the United States. The test is administered to 45

krok68 [10]

Answer:

The 95% confidence interval is $1003 < \mu$

Yes there is statistically significant evidence that students in Florida perform differently from other students in the United States

Step-by-step explanation:

From the question we are told that

The population mean is $\mu = 1000$

The sample size is $n = 453$

The sample mean is $\= x = 1013$

The standard deviation is $s = 108$

Given that the confidence level is 95% then the level of significance is mathematically represented as

$\alpha = 100 - 95$

=> $\alpha = 5\%$

=> $\alpha = 0.05$

The critical value for $\frac{\alpha }{2}$ obtained from the normal distribution table is

$Z_{\frac{\alpha }{2} } = 1.96$

Generally the margin of error is mathematically represented as

$E = Z_{\frac{\alpha }{2} } * \frac{s}{\sqrt{n} }$

=> $E = 1.96 * \frac{108}{\sqrt{453} }$

=> $E = 9.946$

Generally the 95% confidence interval is mathematically represented as

$\= x - E < \mu < \= x + E$

=> $1013 - 9.946 < \mu < 1013 + 9.946$

=> $1003 < \mu$

Given that the population mean(1000) is not within the 95% confidence interval for l for the average test score for students in Florida, then it means that there is statistically significant evidence that students in Florida perform differently from other students in the United States

4 0

3 years ago