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algol13
2 years ago
14

Which value of y makes the equation y+4.2=21 true?

Mathematics
1 answer:
FromTheMoon [43]2 years ago
8 0

Answer:

16.8

Step-by-step explanation:

21-4.2= 16.8

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Find the critical value of x2 based on the given information H1 >3.5 n=14 a=0.05
egoroff_w [7]

Answer:

The degrees of freedom are given by:

df = n-1=14-1=13

The significance level is \alpha=0.05 and then the critical value can be founded in th chi square table we need a quantile that accumulates 0.05 of the area in the right tail of the distribution and for this case is:

\chi^2_{\alpha}= 22.362

And if the chi square statistic is higher than the critical value we can reject the null hypothesis in favor of the alternative.

Step-by-step explanation:

We have the followign system of hypothesis:

Null hypothesis: \sigma^2 \leq 3.5

Alternative hypothesis: \sigma^2 >3.5

The degrees of freedom are given by:

df = n-1=14-1=13

The significance level is \alpha=0.05 and then the critical value can be founded in th chi square table we need a quantile that accumulates 0.05 of the area in the right tail of the distribution and for this case is:

\chi^2_{\alpha}= 22.362

And if the chi square statistic is higher than the critical value we can reject the null hypothesis in favor of the alternative.

4 0
3 years ago
Justin is redoing his bathroom floor with tiles measuring 5in. By 14 in. The floor has an area of 8,500 square inches. What is t
ch4aika [34]
<h3>Answer:</h3>

He will need at least 122 tiles

<h3>Step-by-step explanation:</h3>

Get the area of the tiles

5*14= 70 square inches per tile

Divide the floor area by the tile area

8,500/70

121.428571

Round up

122

4 0
3 years ago
Need help on #5, please help :)
Gre4nikov [31]
Okay i answered by comment but now i can make an official answer here:

a) i got 5,828.6 grams / about 13lb

b) i got 273,391.48$

hope this helps!
6 0
3 years ago
Which of these strategies would eliminate a variable in the system of equations?
ahrayia [7]

Graphing or elimination

5 0
3 years ago
Which of the following expressions is equivalent to (- 4) ^ 5
Anna [14]

Answer:

I can't see the options but the answer is -1,024

Step-by-step explanation:

-4^5= -4 × (-4) × (-4) × (-4) × (-4)= -1,024

7 0
3 years ago
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