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ss7ja [257]
2 years ago
9

2. The two equal sides of an isosceles triangle each have a length of 4x + y - 5. The perimeter of the triangle is

Mathematics
1 answer:
Sever21 [200]2 years ago
5 0

9514 1404 393

Answer:

  2x +2y -8

Step-by-step explanation:

If the equal sides are 'a' and the third side is 'b', then the perimeter is ...

  P = a +a +b = 2a +b

The length of the third side is then ...

  b = P -2a . . . . . . subtract 2a from both sides

Substituting the given expressions, we find ...

  b = (10x +4y -18) -2(4x +y -5)

  b = 10x +4y -18 -8x -2y +10

  b = 2x +2y -8 . . . . the length of the third side

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