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bezimeni [28]
2 years ago
12

Convert each part of the ratio to percentage(a) 3:1(b) 2:3:5(c) 1:4(d) 1:2:5​

Mathematics
1 answer:
Scorpion4ik [409]2 years ago
5 0
3:1 =300%
2:3:5 =50%
1:4 =25%
1:2:5 =62.5%
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What is the solution to this system of equations?
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Answer:

First choice.

Step-by-step explanation:

You could plug in the choices to see which would make all the 3 equations true.

Let's start with (x=2,y=-6,z=1):

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2(2)+-6-1=-3

4-6-1=-3

-2-1=-3

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3x-z=5

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5=5 is true so the first choice satisfies the third equation.

We don't have to go any further since we found the solution.

---------Another way.

Multiply the first equation by 2 and add equation 1 and equation 2  together.

2(2x+y-z=-3)

4x+2y-2z=-6 is the first equation multiplied by 2.

5x-2y+2z=24

----------------------Add the equations together:

9x+0+0=18

9x=18

Divide both sides by 9:

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Using the third equation along with x=2 we can find z.

3x-z=5 with x=2:

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2(2)+y-1=-3

4+y-1=-3

3+y=-3

Subtract 3 on both sides:

y=-6

So the solution is (x=2,y=-6,z=1).

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