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Blababa [14]
3 years ago
12

X^2+10x-25=0solve by completing the square

Mathematics
1 answer:
julsineya [31]3 years ago
7 0
Hope this is the answer

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Which function in Excel is used to perform a test of independence? a. T.TEST b. CHISQ.TEST c. NORM.S.DIST d. Z.TEST
denis23 [38]

Answer:

b. CHISQ.TEST

Step-by-step explanation:

Notation and previous concepts

A chi-square test is "used to test if the variance of a population is equal to a specified value. This test can be either a two-sided test or a one-sided test. The two-sided version tests against the alternative that the true variance is either less than or greater than the specified value"

The statistic is given by:

\chi^2 = \sum_{i=1}^n \frac{(O_i-E_i)^2}{E_i}

In order to calculate the p value we need to have in count the degrees of freedom , on this case df=(rows-1)(#cols-1). And we can calculate the p value would be given by:

p_v =P(\chi^2 >\chi^2_{calc})

But the correct comand is given by:

b. CHISQ.TEST(Actual range, Expected range)

We just need to put in one column the Observed values and in other the expectec values.

3 0
3 years ago
Solve by Factoring<br><br> 3b^4−6b^2+27b
Ganezh [65]

Answer:

Step-by-step explanation:

hello :

3b^4−6b^2+27b = 3b(b^3-2b+9)

8 0
2 years ago
MATH - VOLUME OF FIGURE
Allushta [10]

Answer:

to find the volume of a cylinder

V=π x r^2 x h

now since we want the whole figure were going to add up the two heights to get one height number 4ft + 5ft = 9ft

V= 3.14 x 3^2ft x 9ft

V= 3.14 x 9ft^2 x 9ft

V= 254.34

i tried my best and this is what i know

~batmans wife dun dun dun...

4 0
3 years ago
Steve drove for 8 1/2 hours at 72 miles per hour. How much distance did he travel?
Pie

Answer:

He traveled 612 miles in total.

Step-by-step explanation:

You simply multiply the mph he was going to how long he traveled for. This gives us 72x8.5 equaling 612.

7 0
3 years ago
Read 2 more answers
Can someone help on a)<br> please its due soon :(
san4es73 [151]
You have to draw a north line at A and measure the angle clockwise. So since B is due East of A, the bearing will be 090 degrees
3 0
3 years ago
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