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Maru [420]
3 years ago
12

At the flower show, 1 trolley arrives every 4 minutes to take people to the Rose Pavilion, another trolley arrives every 10 minu

tes take people to the exotic flower greenhouse. Both trollies just arrived at the main building. How many minutes from now will be the next time the trolleys arrive at the main building together?
Mathematics
2 answers:
velikii [3]3 years ago
6 0

Answer:

20 minutes

Step-by-step explanation:

IrinaK [193]3 years ago
5 0

Answer: 20 minutes

Step-by-step explanation: i don’t feel like explaining

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QUESTION 1
Kitty [74]

It's difficult to make out what the force and displacement vectors are supposed to be, so I'll generalize.

Let <em>θ</em> be the angle between the force vector <em>F</em> and the displacement vector <em>r</em>. The work <em>W</em> done by <em>F</em> in the direction of <em>r</em> is

<em>W</em> = <em>F</em> • <em>r</em> cos(<em>θ</em>)

The cosine of the angle between the vectors can be obtained from the dot product identity,

<em>a</em> • <em>b</em> = ||<em>a</em>|| ||<em>b</em>|| cos(<em>θ</em>)   ==>   cos(<em>θ</em>) = (<em>a</em> • <em>b</em>) / (||<em>a</em>|| ||<em>b</em>||)

so that

<em>W</em> = (<em>F</em> • <em>r</em>)² / (||<em>F</em>|| ||<em>r</em>||)

For instance, if <em>F</em> = 3<em>i</em> + <em>j</em> + <em>k</em> and <em>r</em> = 7<em>i</em> - 7<em>j</em> - <em>k</em> (which is my closest guess to the given vectors' components), then the work done by <em>F</em> along <em>r</em> is

<em>W</em> = ((3<em>i</em> + <em>j</em> + <em>k</em>) • (7<em>i</em> - 7<em>j</em> - <em>k</em>))² / (√(3² + 1² + 1²) √(7² + (-7)² + (-1)²))

==>   <em>W</em> ≈ 5.12 J

(assuming <em>F</em> and <em>r</em> are measured in Newtons (N) and meters (m), respectively).

3 0
3 years ago
Which expression is not equivalent to the other expressions?
Ket [755]
That would be D

the first 3 = -12x + 24

bur D  = -12x - 24
4 0
3 years ago
Read 2 more answers
Someone please help, i honestly don’t get how to find the angles
jeyben [28]
A.) the degrees inside the triangles are 50, 70, and 60. you know because 180-120=60
b.) you know that they are similar triangles because they have the same angle degrees.

im not sure if this is correct but i think it is :)

8 0
3 years ago
The dot plot below shows the number of items in the basket of some shoppers:
scoray [572]

Answer:

The correct answer is A.

Remember summetric means: made up of exactly similar parts facing each other or around an axis; symmetrical. And the peak or highest part is on the 3.

Hope it helps!!

7 0
3 years ago
Read 2 more answers
Solve the system of equations - 6x + 8y = –10 and - 4x + y = –11 by<br> combining the equations.
elena55 [62]
Answer: (3, 1) :)

Explanation:
-6x + 8y = -10
-4x + y = -11
-32x + 8y = -88
26x = 78
x = 3
-18 + 8y = -10
8y = 8
y = 1

(Also, can I have brainliest please?)
5 0
2 years ago
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