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Paha777 [63]
3 years ago
6

Please help me ASAP!!!! I'm really confused. I will award brainliest!!

Mathematics
2 answers:
Roman55 [17]3 years ago
7 0

Answer:

X=18.5

Y=37

Step-by-step explanation:

DOB=16° because it's a vertical pair. Because COF is 90°, that means 4x+16 is also 90.

4x+16=90, subtract 16

4x=74, divide by 4

x=18.5

Because EOA is 90°, and you know DOB is 16°, you can set 2y+16 equal to 90 as well.

2y+16=90, subtract 16

2y=74, divide by 2

y=37

kari74 [83]3 years ago
3 0

Answer:

x=18.5\° and y=37\°

Step-by-step explanation:

Givens:

  • AB and CD are straight lines. Which means all angles on those lines must sum 180°.

\angle AEO = 90\°, \angle AOC = 16\°, \angle FOB = 4x,  \angle COF = 90\°, by given.

Now, 16\° + 90\° + 2y=180\°, by defintion of straight lines and supplementary angles.

Then, we solve for y

2y=180-106\\y=\frac{74}{2}\\ y=37\°

Now,

\angle BOD = \angle AOC = 16\°, by vertical angles definiton.

Then,

90\°+4x+16\°=180\°, by defintion of straight lines and supplementary angles.

Then, we solve for x

4x=180-106\\x=\frac{74}{4} =18.5\°

Therefore, the solutions are x=18.5\° and y=37\°

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Thepotemich [5.8K]

Answer:

Option (b) is the answer.

Step-by-step explanation:

If two distinct lines intersect

Then they are not parallel because parallel lines never intersect they go hand in hand

But since, we need to tell which is not true

So, option A is discarded.

Option (c) and (d) are also true hence, discarded.

Option (b) is correct that is the lines are perpendicular this is not true. hence, considered

Therefore, option (b) is the answer.

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3 years ago
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A can in the shape of a cylinder has a diameter of 10 cm and a height of 6 cm. how much wrapping paper is needed to cover the cy
Sergeeva-Olga [200]

Answer:

Step-by-step explanation:

To determine the amount of wrapping paper needed to cover the can, we would determine the total surface area of the cylindrical can. The formula for determining the total surface area of a cylinder is expressed as

Total surface area = 2πr² + 2πrh

Where

r represents the radius of the cylinder.

h represents the height of the cylinder.

π is a constant whose value is 3.14

From the information given,

Diameter = 10 cm

Radius = diameter/2 = 10/2

Radius = 5 cm

Height = 6 cm

Therefore,

Total surface area = (2 × 3.14 × 5²) + (2 × 3.14 × 5 × 6)

= 157 + 188.4 = 345.4 cm²

345 cm² of wrapping paper is needed to cover the cylinder.

2) Volume of cylinder = πr²h

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erica [24]

Answer:

the probability of a Type II error if in fact the mean waiting time u, is 9.8 minutes is 0.1251

Option A) is the correct answer.

Step-by-step explanation:

Given the data in the question;

we know that a type 11 error occur when a null hypothesis is false and we fail to reject it.

as in it in the question;

obtained mean is 9.8 which is obviously not equal to 8.3

But still we fail to reject the null hypothesis says mean is 8.3

Hence we have to find the probability of type 11 error

given that; it is right tailed and o.5, it corresponds to 1.645

so

z is equal to 1.645

z = (x-μ)/\frac{S}{\sqrt{n} }

where our standard deviation s = 3.8

sample size n = 50

mean μ = 8.3

we substitute

1.645 = (x - 8.3)/\frac{3.8}{\sqrt{50} }

1.645 = (x - 8.3) / 0.5374

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P(z<-1.15) = 0.1251

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