Step-by-step explanation:


and,

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☆Find the 

Here,
BC =AC
so,
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we know that,

But
(Ģìvéñ)
so..







But...

soo,


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Answer:
A
Step-by-step explanation:
Please ask if you have further questions
Answer:
y= -1/2x + 3
Step-by-step explanation:
You would subtract x and then rearrange where it would become 2y= -x +6. Then you would divide -x+6 by 2 which would give you the answer y= -1/2x + 3.
Subtract the 9 from 9 to cancel it out. Then subtract 9 from 15, which is 6. And 6 times 7 is 42.