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Kruka [31]
3 years ago
13

Forgot to do my homework I need help because my parents are sleeping and I forgot how to do this (find the letter)

Mathematics
1 answer:
mash [69]3 years ago
5 0

27. v = 56

28. a = 9

29. m = 15

30. m = -10

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1. A ship sails at a constant speed of 20 km/hr. The ship leaves port and sails 20 degrees north of east for 2 hours. The ship t
andre [41]
The ship sails at 20 km / h.
 So
 20 km / h x 2 h = 40 km
 The boat moves 40 km to the northeast.
 Then, in the same way:
 20 km / h x 1 h = 20 km.
 The ship moves 20 km northwest.
 We solve this problem using vectors. In this case, we must perform the sum of two vectors a and b
 a) magnitude = 40 km and direction 20 degrees east
 b) magnitude = 20 km and direction 10 degrees northwest
 In Cartesian coordinates, these vectors are written as:
 a) 40sin (20º) i + 40cos (20º) j = 13,68i + 37,59j
 b) -20sin (10th) i + 20cos (10th) j = -3,473i + 19,70j
 The displacement vector of the ship would be the sum of a + b
 a + b = 10,207i + 57,29j Finally, the magnitude of the a + b vector will tell us how far the ship is
 √(10.21² + 57.29²) = 58.92km
6 0
3 years ago
I just need help with this then I'm done with my homework
valina [46]

Answer:15

Step-by-step explanation:

1 2/3*9=15

5 0
3 years ago
Read 2 more answers
X - 8 ≤ 4 or 2x + 3 &gt; 9<br> step by step pls
Alchen [17]

Answer:

x - 8 ≤ 4

  +8    +8                         Add eight to both sides of the equation.

X≤12

2x + 3 > 9

     -3     -3                        Subtract three from both sides

2x>6                                  Divide both sides by 2

x>3

Hope this helps!

Have an amazing day/night!

3 0
3 years ago
Brenda says a good estimate for 50× 31 3/4 is 800. is this correct? Explain.
QveST [7]
At first glance, it seems like a good estimate; big numbers make bigger number.
But, this is multiplication, which means big numbers will make an extraordinarily big number, in proportion to the numbers themselves.
If you round 31 3/4 up to 32, you can multiply that by 50. To make the estimate easier, multiply 50 by 2,
50 x 2 = 100
Take the zeros off 50 and 30 to make this a bit simpler, and multiply 5 by 3,
5 x 3 = 15
Add each of the zeros you took off to the 15 to make 1500 (1 zero was taken off 50, and 1 off of 30),
And then add 1500 to that other 100
1500 + 100 = 1600
A good estimate for 50 x 31 3/4 would be 1600, not 800.
Therefore,
No. Brenda's estimate of 800 is NOT a good estimate.
3 0
4 years ago
Read 2 more answers
14 + 10y ≥ 3(y + 14) <br> A. y ≥ –4<br>B. y ≥ 4 <br>C. y ≥ 8<br>D. y ≥ 6
arsen [322]

Answer:

B

Step-by-step explanation:

Given

14 + 10y ≥ 3( y + 14) ← distribute

14 + 10y ≥ 3y + 42 ( subtract 3y from both sides )

14 + 7y ≥ 42 ( subtract 14 from both sides )

7y ≥ 28 ( divide both sides by 7 )

y ≥ 4 → B

7 0
3 years ago
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