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adoni [48]
2 years ago
13

Can someone double check that this is correct? If not please correct me :)

Mathematics
1 answer:
bija089 [108]2 years ago
7 0
Yeah you are correct, also I need brainlest please
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Does anyone know? <br> Can anyone help me throughout these type of questions?
ozzi
Your answer would be D you would add up all the days together then just put the clear days together to get 17/30 that then reduces to .57
4 0
3 years ago
What is the square root of 67
Inessa [10]

Every positive number has two square roots.

The square roots of  67  are  8.185... (rounded) and  -8.185... (rounded) .

Both are irrational numbers, so they can't be completely written down
with digits.  No matter how many decimal places I write, it can never be
enough, because these decimals go on forever and never end.

3 0
3 years ago
Read 2 more answers
Suppose that each observation in a random sample of 100 fatal bicycle accidents in 2015 was classified according to the day of t
liraira [26]

Answer:

The calculated χ² =  0.57   does not fall in the critical region χ² ≥  12.59  so we fail to reject the null hypothesis and conclude the proportion of fatal bicycle accidents in 2015 was the same for all days of the week.

Step-by-step explanation:

1) We set up our null and alternative hypothesis as

H0:  proportion of fatal bicycle accidents in 2015 was the same for all days of the week

against the claim

Ha:  proportion of fatal bicycle accidents in 2015 was not the same for all days of the week

2) the significance level alpha is set at 0.05

3) the test statistic under H0 is

χ²= ∑ (ni - npi)²/ npi

which has an approximate chi square distribution with ( n-1)=7-1=  6 d.f

4) The critical region is χ² ≥ χ² (0.05)6 = 12.59

5) Calculations:

χ²= ∑ (16- 14.28)²/14.28 + (12- 14.28)²/14.28 + (12- 14.28)²/14.28 + (13- 14.28)²/14.28 + (14- 14.28)²/14.28 + (15- 14.28)²/14.28 + (18- 14.28)²/14.28

χ²= 1/14.28 [ 2.938+ 5.1984 +5.1984+1.6384+0.0784 +1.6384+13.84]

χ²= 1/14.28[8.1364]

χ²= 0.569= 0.57

6) Conclusion:

The calculated χ² =  0.57   does not fall in the critical region χ² ≥  12.59  so we fail to reject the null hypothesis and conclude the proportion of fatal bicycle accidents in 2015 was the same for all days of the week.

b.<u> It is r</u>easonable to conclude that the proportion of fatal bicycle accidents in 2015 was the same for all days of the week

6 0
3 years ago
Please please help ASAP please please I’ll mark you as a branlist
wel

Answer:

4°

Step-by-step explanation:

Since it is said that the angles are corresponding angles so we know that corresponding angles are equal then,

<1 = <2

3x - 7 ° = x - 1°

3x - x = 7° - 1°

2x = 8°

x = 8° / 2

Therefore x = 4°

Hope it will help you :)

5 0
3 years ago
Iven right triangle XYZ, what is the value of tan(60°)?
gayaneshka [121]
Sqrt of 3......................................
3 0
3 years ago
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