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zlopas [31]
3 years ago
12

Which of the following is a tautology?

Mathematics
1 answer:
AnnyKZ [126]3 years ago
8 0
B or D? I’m just guessing sorry that I might get the wrong answer I’m a newbie
You might be interested in
If all of the diagonals are drawn from a vertex of a hexagon, how many triangles are formed?
Elan Coil [88]
If we consider it as a combination problem, then we could calculate the how many combinations are there if we pick up three nodes out of six nodes, and then we have:
C_{6}^{3}= \frac{6*5*4}{3*2*1}  =20
And the answer should be 20
5 0
3 years ago
Read 2 more answers
On August 20, 1989, in Cologne, West Germany, Said Aouita of Morocco also established a world record when he ran the 3000. m run
zalisa [80]

Answer:

Average speed of Aouita = 6.68 meter per second.

Step-by-step explanation:

To create a world record Aouita ran a distance = 3000 m

He took the time to cover this distance = 7 minutes 29.45 seconds

                                                                 = (7×60) + 29.45 seconds

                                                                 = 449.45 seconds

Since, formula for the average speed is given by,

Average speed = \frac{\text{Total distance covered}}{\text{Total time taken}}

Therefor, average speed of Aouita = \frac{3000}{449.45}

                                                          = 6.675

                                                          ≈ 6.68 meter per second

Average speed of Aouita was 6.68 meter per second.

8 0
3 years ago
Just points for whomever help me ​
Ket [755]

Answer:

with what do you need help with your life

Step-by-step explanation:

6 0
3 years ago
Please solve the equation:4(y-3)=3(y+6) and please show your work!
dalvyx [7]
4(y-3)=3(y+6)
1) Distribute
4y-12=3y+18
2) Addition property of equality
4y=3y+30
3)Subtraction property of equality
y=30
Thats your answer!
Enjoy middle school while you still can!
6 0
3 years ago
The excavation for a house and the trucks to carry away the material have the dimensions shown. About how many level truck loads
Inessa05 [86]

Answer:

<h3>This means that about 21 level truck loads are necessary to remove all dirts.</h3>

Step-by-step explanation:

To get the number of level truck loads needed to remove all the dirts in the house, first we need to calculate volume of the truck and the house.

Volume of truck = Length * Breadth * Height

If the truck is 5.0 for the length 2.0 for the height 3.0 for the side base;

Volume of the truck = 5*2*3

Volume of truck = 30

For the house;

Volume of house = Length * Breadth * Height

If the house is 4.0 for the height 14.5 for the length and 11.0 for the side base, then

Volume of the house = 4*14.5*11 = 638

Number of level truck loads needed to remove all the dirts = Volume of house/Volume of the truck = 638/30 ≈ 21.3

This means that about 21 level truck loads are necessary to remove all dirts.

8 0
3 years ago
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