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3 years ago

What is the measure of ZA?

Mathematics

1 answer:

ehidna [41]3 years ago

8 0

B. 60°
This is an equilateral triangle, so all angles should be equal. 180/3=60, so you’re answer is 60.

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PLEASE HELP IM BEING TIMED

Zigmanuir [339]

Step-by-step explanation:

You have miscopied the second equation as it contains a third variable B when there isn't a B in the answers.

Please correct it for assistance

7 0

3 years ago

A 90 percent confidence interval for the slope of a regression line is determined to be (-0.181, 1.529). Which of the following

GenaCL600 [577]

Answer: a. The correlation coefficient of the data is positive.

Step-by-step explanation:

Estimated slope of sample regression line = $\dfrac{Upper \ limit + lower\ limit}{2}$

Here , confidence interval : (-0.181, 1.529)

Estimated slope of sample regression line = $\dfrac{-0.181+1.529}{2}$

$=\dfrac{1.348}{2}\\\\=0.674\ \ \ \ [\text{ positive}]$

⇒Correlation coefficient(r) must be positive, So a. is true.

But, d. and e. are wrong(0.674 ≠ 0 or 1.348).

We cannot check residuals or its sum from confidence interval of slope of a regression line, so b is wrong.

We cannot say that scatterplot is linear as we cannot determine it from interval, so c. is wrong

So, the correct option : a. The correlation coefficient of the data is positive.

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3 years ago

Find x. Please help!

Viefleur [7K]

Answer:

Im not good at these so maybe 105°? Sorry if its wrong

Step-by-step explanation:

5 0

3 years ago

Z^4-4z^3+4z^2+48=0 how to find value of z?

Aliun [14]

There are no real solutions to solve Z. If there may be a typo or something, there are no solutions.

3 0

2 years ago

HELPPPPP!!!! 20 POINTS GIVEN!

babunello [35]

Answer:

Answer

4.0/5

JannetPalos

While representing 3 - 4 on the number line, from the starting point 0, we need to show an arrow to three numbers on the right.

Since - 4 is the additive inverse of 4, from the point where the first arrow pointed, we should go 4 points to the left.

Hence, the number line which shows an arrow from 0 to 3, and then from 3 to negative 1 is the correct one.

Step-by-step explanation:

Hope that helps!!

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3 years ago