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Andrei [34K]
3 years ago
11

-2x+3y=-12 2x+y=4 After adding the two equations to eliminate x you are left with 4y=-8 solve for y

Mathematics
2 answers:
natita [175]3 years ago
3 0

-2x+3y=-12 2x+y=4

add together

4y = -8

divide by 4

y = -2


slamgirl [31]3 years ago
3 0

Answer:

-2

Step-by-step explanation:

edge 2020

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ddd [48]

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Step-by-step explanation:

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8 0
3 years ago
Last year, the world produced 3.5 billon tons of cement and that amount could increase by a billion tons by year 2050. Express t
Svetradugi [14.3K]

Answer:

4.5 \times 10^{9} tons.

300 times.

Step-by-step explanation:

Last year, the world produced 3.5 billion tons of cement and that amount could increase by a billion tons by the year 2050.

So, the net production of cement by the year 2050 will be (3.5 + 1) = 4.5 billion tons i.e. 4.5 \times 10^{9} tons. (Answer)

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5 0
3 years ago
Which values represent the first two terms of the sequence a1=2 and an=-2(an-1)^2?
Mars2501 [29]
Hello,

a_{1}=2
a_{n+1}=-2*a_{n}^2

a_{1}=2
a_{2}=-2*2^{2}=-8
a_{3}=-2*(-8)^{2}=-2*64=-128


Answer C






3 0
3 years ago
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