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jolli1 [7]
4 years ago
15

When did the human brain achieved its modern size

Advanced Placement (AP)
1 answer:
lawyer [7]4 years ago
5 0
<span>Across nearly seven million years, the human brain has tripled in size, with most of this growth occurring in the past two million years.</span>
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Solve the following systems of 3-variable linear equations.​
Zina [86]

Answer:

x = 9/25, y = 7/25, z = 4/25

Explanation:

step 1: solve for y in first equation to use substitution

y = -2x + 1

step 2: insert into second equation to eliminate y variable and work with two variables

3(-2x+1) + z = 1 (now distribute)

-6x + 3 + z = 1 (bring over the -3)

-6x + z = -2

step 3: now left with -6x + z = -2 and x + 4z = 1, so eliminate z

-6x + z = -2 (multiply by 4)

4(-6x + z = -2)

-24x + 4z = -8

-

x + 4z = 1 (brought down third equation)

-25x = -9

x = 9/25

then just plug in x into the third equation to solve for z, followed by plugging it into the first equation to solve for y. you should end with y = 7/25 and z = 4/25

6 0
3 years ago
If a chicken truly has two legs, why then do we drink cold water?​
blsea [12.9K]

Answer:

duuuuuuudeeeeeee

Explanation:

I'm questioning my existence rn

3 0
3 years ago
Read 2 more answers
Bakit nagalit ang mga Tsino sa simula ng pamumuno ng mga Manchu?
matrenka [14]
Ang emperyo ng Tsina ay sinakop ng halos 120,000 Manchus. ... Noong 1644, sinamantala ng Manchus ang paghihimagsik at kaguluhan sa emperyo ng Tsina at lumipat sa timog. Bumubuo ng isang alyansa sa isang loyalistang heneral ng Ming, pumasok sila sa Beijing noong Hunyo at halos agad na kumuha ng kapangyarihan para sa kanilang sarili.

Ang Manchu Conquest ng Tsina ay na-spark noong Abril 1618 nang magpalabas ng proklamasyon ang pinuno ng tribong Jurchen na si Nurhaci mula sa rehiyon ng Manchurian na naglilista ng pitong mga hinaing laban sa naghaharing dinastiyang Ming.
3 0
3 years ago
Evaluate8 cubed . Use pencil and paper. Explain how you can check that your result is correct. Show your work.
Darya [45]

Answer:

512

Explanation:

8 cubed is written as 8 to the power of 3 or 8*8*8

which is 8 times 8 times 8

let's break it down

8*8 = 64

64*8=512

final answer: 512

to check, do the opposite of what you just did

take the cubed root of 512

and you'd get 8

8 0
3 years ago
Are mars and the moon the same planet?
rodikova [14]

Answer:

No

Explanation:

Because space

8 0
3 years ago
Read 2 more answers
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