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dem82 [27]
2 years ago
14

A triangle has a perimeter of 11.5 feet. The side lengths are x feet, 2x – 2 feet, and 3x + 1.5 feet. What is the value of x?​

Mathematics
2 answers:
Julli [10]2 years ago
7 0

Answer:

perimeter = h + l + b \\  = x + 2x - 2 + 3x + 1.5 = 11.5 \\ x \: terms \: togather \\ x + 2x + 3 x- 2 + 1.5 = 11.5 \\ 6x - .5 = 11.5 \\ 6x = 11.5 + .5 \\ 6x = 12 \\ x =  \frac{12}{6}  \\ x = 2 \\ thank \: you

Ronch [10]2 years ago
4 0

Answer:

  • x = 2 feet

Step-by-step explanation:

<u>We know that the perimeter is the sum of side lengths.</u>

  • P = a + b + c

<u>Substitute the values and solve for x:</u>

  • x + 2x - 2 + 3x + 1.5 = 11.5
  • 6x - 0.5 = 11.5
  • 6x = 12
  • x = 12/6
  • x = 2
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