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The straight lines 7x-2y+10=0 and 7x+2y-...

The straight lines `7x-2y+10=0` and `7x+2y-10=0` form an isosceles triangle with the line `y=2.` The area of this triangle is equal to `(15)/7s qdotu n i t s` (b) `(10)/7s qdotu n i t s` `(18)/7s qdotu n i t s` (d) none of these

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