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3 years ago

3x-2y=8 and 0.5x+y=17

1 answer:

7 0

2y is in the first equation so if you change 0.5x+y=17 to y=17-0.5x and then double it to 2y=34-x, you can substitute and find x. And then you can find out y.

How to find x:

0.5x+y=17

y=17-0.5x

2y=34-x

3x-2y=8

3x-34-x=8

How to find y (with previous info.)

x=21

3x-2y=8

3*21-2y=8

63-8=2y

55=2y

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Answer:

Option (4)

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Area of a triangle = $\frac{1}{2} (a.b.\text{Sin}\theta)$

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