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amid [387]
3 years ago
7

4x + 2y = 2 2x + y = 4 Step by step explanation please

Mathematics
2 answers:
k0ka [10]3 years ago
8 0

Step-by-step explanation:

by using substitution method

4x+2y=2-----i

2x+y=4-------ii

make y the subject of the formula in equation ii

2x+y=4

y=4-2x------iii

substitute equation iii into equation i

4x+2y=2

4x+2(4-2x)=2

4x+8-4x=2

collect like terms

4x-4x=2-8

0=-6

actually they're no solutions to this simultaneous equation

Harlamova29_29 [7]3 years ago
4 0

Answer:

No solutions

Step-by-step explanation:

4x + 2y = 2

2x + y = 4

we need to evaluate for y is "2x + y = 4" to be able to solve this.

2x + y = 4

2x - 2x + y = 4 - 2x

y = -2x + 4

4x + 2y = 2

4x + 2(-2x + 4) = 2

4x -4x + 8 = 2

8 = 2

NO solutions

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The answer is -76.1 meters.

The submarine elevation before rising is -203 meters (it is negative because it is under the sea level which has 0 elevation): d₁ = -203 m
After the first rising, it moved 64.5 m: l₁ = 4.3 · 15 = 64.5 m
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So, to calculate the elevation of the submarine after rising (d₂), we will add (because it is not going deeper, it rises toward the elevation of 0) two movements to the elevation before rising:
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