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Alexus [3.1K]
3 years ago
15

A migrating bird flies 390 miles in 15 hours. How many miles does it fly in 4 ​hours?

Mathematics
1 answer:
viva [34]3 years ago
6 0

Answer:

104

Step-by-step explanation:

390/15=26

26 times 4 is 104

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2. A prototype of a part is to be fabricated using stereolithography. The base of the part is shaped like a right triangle with
mafiozo [28]

Answer:

T_{m} =1.53 hr

Step-by-step explanation:

In your question 30mm should be the thickness. Also, the minimum possible time is required.

SOLUTION:

The part should be oriented on its side in stereo lithography, thus laser Area A is same for all layers.

A= 1/2 (b x h) =>0.5 (36 x 38)

A= 864 mm²

Time to complete one layer 'T' is same for all layers

T= [(A/spot size x velocity)+ last time]

T=[(864/ 0.15x2200) +25]

T=27.62 sec

Number of layers 'n' is given by:

n= t/ layer thickness =>30/0.15

n= 200 layers.

Next is to determine minimum possible time required,

T_{m} = n x T =>200 x 27.62

T_{m} =5524 s /60

T_{m} =92.06 min/60

T_{m} =1.53 hr

7 0
3 years ago
Help please !! geometry problems.
Akimi4 [234]

Answer:

see explanation

Step-by-step explanation:

The sum of the 3 angles in a triangle = 180°

In each question sum the 3 angles and equate to 180

3

a.

x + 8x + 90 = 180

9x + 90 = 180 ( subtract 90 from both sides )

9x = 90 ( divide both sides by 9 )

x = 10

b

4x - 5 + 3x + 11 + 90 = 180

7x + 96 = 180 ( subtract 96 from both sides )

7x = 84 ( divide both sides by 7 )

x = 12

4.

4x + 2x + 11 + 19 = 180

6x + 30 = 180 ( subtract 30 from both sides )

6x = 150 ( divide both sides by 6 )

x = 25

5.

5x + 20 + 2x - 5 + 3x - 10 = 180

10x + 5 = 180 ( subtract 5 from both sides )

10x = 175 ( divide both sides by 10 )

x = 17.5

3 0
3 years ago
How do I do this problem?
Elza [17]
For this problem, here’s how you do it.
4 0
3 years ago
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-2x + y = 0<br> x - y = -3
miv72 [106K]

Answer:

The value of x is 3 and y is 6.

Step-by-step explanation:

You can solve this simultaneous equation by elimination method :

- 2x + y = 0 -  -  - (1)

x - y =  - 3 -  -  - (2)

(1) + (2)

- 2x + y + x  + (- y) = 0 + ( - 3)

- x =  - 3

x = 3

substitute \: x = 3 \: into \: (2)

(2)⇒

3 - y =  - 3

- y =  - 6

y = 6

7 0
3 years ago
Which of the following represents a chord, but not a diameter, of the circle?
Katena32 [7]
Please provide with diagar
3 0
3 years ago
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