3 years ago

O quadro de 3^5 é = contas

Mathematics

1 answer:

FrozenT [24]3 years ago

4 0

3^5=243, good luck as far as I can understand the question

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1-2+3-4+5-6+..+99-100.

aliya0001 [1]

-50

So you want to pair them up
(1-2)+(3-4)+(5-6)..+(99-100)
And write the answer for each pair
(-1)+(-1)+(-1)..+(-1)
When looking at this you can see that each pair equals -1
So you divide 100 by 2 and multiply that by the -1
100/2=50
50*-1=-50
Answer is 50

You would use the same method if you were going up to a number like a 500
The answer would be -250

6 0

4 years ago

Question 1. What is the probability of choosing a blue block out of a bag containing 4 red , 2 blue , and 4 green blocks ?

sergey [27]

Answer:

Question 1. 2/10

Question 2. 1/4

Question 3. 4/8

Question 4. 3/15

Question 5. 4/10

4 0

4 years ago