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Sveta_85 [38]
2 years ago
6

What is the solution for x in the equation?

Mathematics
1 answer:
erastovalidia [21]2 years ago
7 0
The solution for x is D=-4

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For what percentage of time has life existed on earth (round to the nearest whole number).
abruzzese [7]
This is the concept of arithmetic. To calculate the percentage of time life has existed we proceed as follows;
According to history:
The age of earth is 4.6 billion years
the age of life is as it appeared from unicellular is 3.8 billion years.
thus the percentage of the above will be:
3.8/4.6 x 100
=0.82609x100
=82.609%

6 0
2 years ago
You want to estimate the number of students in your middle school school who buy school lunch. Which sample is unbiased?
Nezavi [6.7K]
A biased example: Asking students who are in line to buy lunch 

An unbiased example: Asking students who are leaving/going to lunch(<em>NOT buying </em><em>lunch</em><em />).

But in this case, the answer choices can be... confusing.
Don't panic! You're given numbers and, of course, your use of logic.

Answer choice A: 100 students grades 6-8
Answer choice B: 20-30 students any <em>one</em> grade<em></em><em>
</em>Answer choice C: 5 students
<em></em>Answer choice D: 50 students grade 8

An unbiased example would be to choose students from <em>any grade.</em> So we can eliminate choices B and D.

Now, the question wants to <em>estimate how many people at your middle school buy lunch.</em> This includes the whole entire school, and if you are going to be asking people, you aren't just going to assume that if 5 people out of 5 people you asked bought lunch, the whole school buys lunch.

So, to eliminate all bias and/or error by prediction, answer choice A, the most number of students, is your answer.

6 0
2 years ago
Eight parentheses x plus two parentheses
jarptica [38.1K]

Answer:

10

Step-by-step explanation:

8+2=10

3 0
3 years ago
A passenger in a vehicle should not
grin007 [14]

Answer:

C. Distract the driver

Step-by-step explanation:

hope it helps

5 0
3 years ago
Help please 20 points to who answers not 10 points 20
hichkok12 [17]

Answer:

Barbarian is the first.

Thatched is second.

Vassal is third.

Granary is fourth.

Step-by-step explanation:

5 0
2 years ago
Read 2 more answers
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