Question

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Answer 1

Explanation:

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prove that two lines are respectively perpendicular to two intersecting lines intersect each otherprove that two lines are respectively perpendicular to two intersecting lines intersect each otherIf n and p are any two intersecting lines.

Draw two lines such that l⊥n andm⊥p

To prove: Lines l andm will intersect.

Proof:

Let n and p be two intersecting lines.

Let us assume that l and m do not intersect each other.

Now l⊥n (Given)

Let us assume that l⊥m

Therefore, m⊥n .(1)

But given that m⊥p .(2)

From (1) and (2), we get n∥p

But given, lines n and p intersect each other.

Hence, our assumption is wrong.

Therefore l and m intersect each other.

Answer 2

Explanation:

selling price is doubled,the profit triple. find the profit percentage a) 100% b) 66.66% c) 75% d)90%