Someone please help me with this question

Option 3.  Option 4.

Step-by-step explanation:

concept to know: when the exponent is a fraction, the numerator will be the real exponent with the base (i.e 7^5), while the denominator will be the root

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b is the numerator which means it will result in

c is the denominator which means it will result in

The combination of this two will be

This will also be presented as

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X=300, Y=200

Step-by-step explanation:

If: X+Y=500,

Then Y = 500-X

IF X-Y=100,

Then:

X-(500-X)=100,

X-500+X=100,

2X-500=100,

2X=100+500

2X=600

X=300.

So,

X+Y=500,

300+Y=500

Y=500-300

Y=200

So:

X=300, Y=200