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anygoal [31]
2 years ago
7

1 bạn học sinh đi học từ nhà đến trường .Nửa đoạn đường đầu , bạn đi với vận tốc là 10km/h,nửa đoạn đường sau,bạn đi với vận tốc

là 15km/h.Tính Vtb của bạn học sinh trên cả quãng đường?
Mathematics
1 answer:
Marysya12 [62]2 years ago
5 0

Answer:

12km/h

Step-by-step explana:

Let's call the total distance 2a from which we can calculate t1 equivalent to the first half of the distance a/10 similar to t2 is a/15 from which the total time is a/6 . We have the average speed equal to the total distance dduowcngf divided by the total inferred time by 2a/(a/6) which equals 12km/h

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M
xxTIMURxx [149]

Answer:

A

Step-by-step explanation:

To answer this, look at one specific point for example, A. It is at the point (3,6). In order for this point to get to where it was moved to, you must rotate it counterclockwise () 90 degrees. Do this by changing the initial point from (x,y) to (-y,x). This is located at (-6,3). Then you can see that it was translated 2 units up from there.

I hope this helped.

3 0
2 years ago
For questions 3 - 5, answer the questions about the equations.
mrs_skeptik [129]

Answer:

  infinite solutions

Step-by-step explanation:

Eliminate parentheses and collect terms:

  3x -12 +5 -x = 2x -7

  2x -7 = 2x -7

This is true for any value of x. There are an infinite number of solutions.

6 0
3 years ago
Quick! Need the answer
zvonat [6]
Replace the x in the equation with the given value of x and you will find that the 3rd equation is corret.

F(X) = 4(1/2)^X

4(1/2)^-2 = 4 * 4 = 16
6 0
2 years ago
Someone pls help me ill give out brainliest pls don’t answer if you don’t know
Alex_Xolod [135]

Answer:

Rectangle shaped cross section is formed by intersection of plane and prism.

Step-by-step explanation:

Given: A rectangular Prism.

To find: Shape of Cross Section when a plane intersect the prism diagonally

A plane intersect the Rectangular prism .i.e, Cuboid diagonally which means plane passes from top edge of cuboid to edge on bottom on opposite side.

Figure is attached.

In this way we get a Rectangular shaped Cross section which includes edges of cuboid and diagonals of the side faces.

Therefore, Rectangle shaped cross section is formed by intersection of plane and prism.

6 0
2 years ago
Problem If you roll two fair six-sided dice, what is the probability that the dice show the same number?
shusha [124]
Lets say yu are trying to roll a 4 on both of the dice the probability for both is 1/6 so multiply 1/6 × 1/6 and you get 1/36
so the probability for rolling the same number on each dice is 1/36
hope this helps!
8 0
2 years ago
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