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3 years ago

HELPPP ME PLEASEEEE asappp

Mathematics

2 answers:

timurjin [86]3 years ago

8 0

Answer:

B.) √3/2

Step-by-step explanation:

34kurt3 years ago

8 0

Answer:

Step-by-step explanation:

For questions like this I recommend memorizing the Unit Circle, but for the sake of calculations here's how I do it using a calculator

cos(30) = 0.866025.....

So now I'll just go through the answers and see which is equivalent

A= 1.73...

B= 0.866025....

C=0.57735....

D=0.5

E=0.7071.....

F=1

You can see that B is equivalent.

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The National Highway Traffic Safety Administration reported the percentage of traffic accidents occurring each day of the week.

Zigmanuir [339]

Answer:

Hence,

Test statistic $X^{2}$ = 9.269.

p value = 0.148

Sunday= 15.23%, Monday= 12.62%, Tuesday= 13.10%, Wednesday=11.67%,

Thursday= 13.10%, Friday= 16.19%, Saturday= 18.09%.

Step-by-step explanation:

relative observed Expected Chi square

Category frequency(p) $O_{i}$ Ei=total*p $(O-E)^{2}$ $R^{2}_{i} =(O_{i} -E_{i} )^{2} /E_{i}$

1 0.142857143 64.0 60.00 16.00 0.267

2 0.142857143 53.0 60.00 49.00 0.817

3 0.142857143 55.0 60.00 25.00 0.417

4 0.142857143 49.0 60.00 121.00 2.017

5 0.142857143 55.0 60.00 25.00 0.417

6 0.142857143 68.0 60.00 64.00 1.067

7 0.142857143 76.0 60.00 256.00 4.267

Total 1.000 420 420 556 9.269

Test statistic $X^{2}$ = 9.269.

p value = 0.148 from excel: chidist(9.269,6)

Percentage %= Frequency of traffic occur on category x 100 / Total number of frequency given.

Category Percentage%

Sunday 15.23%

Monday 12.62%

Tuesday 13.10%

Wednesday 11.67%

Thursday 13.10%

Friday 16.19%

Saturday 18.09%

5 0

3 years ago

C.126<br> D.115<br> Geometry math question no Guessing and Please show work

-BARSIC- [3]

The triangles are said to be similar, so the measures of sides in the larger triangle are proportional to the measures of sides in the smaller triangle. The measures of the two long sides have the ratio 182:65, so we expect the ratio of the shortest sides to be the same:

... ? : 45 = 182 : 65 . . . or . . . ?/45 = 182/65

Multiplying the equation by 45 gives us

... ? = 45·(182/65) = 126

The appropriate choice is ...

... C. 126

5 0

3 years ago

The points (9, 2) is reflected across the x axis what are the cordinates of the reflection

user100 [1]

When reflecting about the x axis, the x value remains the same and the y value becomes the inverse of the original y value (opposite)

The point (9,2) would become (9,-2)

8 0

3 years ago

I don't understand how to do this so please explain or show me how to get the answer

nekit [7.7K]

Answer:

m<ADB=70°

m<ADC=110°

m<DAC=45°

Step-by-step explanation:

<ADB=<ABD(being isosceles triangle: AD=AB)

<ABD+<ADB+<DAB=180°(sum of the angle of triangle is 180°)

2<ADB+40°=180°(<ADB=<ABD and <DAB=40°)

2<ADB=140°

<ADB=70°

<ADB+<ADC=180°(being straight angle)

70°+<ADC=180°

<ADC=110°

<ADC+<ACD+<DAC=180°( sum of the angle of triangle is 180°)

110°+25°+<DAC=180°

<DAC=45°

4 0

3 years ago

The formula to convert Celsius to Fahrenheit is F= 90+32. Convert 87°F to

lina2011 [118]

A. 55 degrees Celsius

4 0

3 years ago

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