Type the correct answer in the box. Use numerals instead of words. If necessary, use / for the fraction bar. Find the sum of a finite geometric series. The sides of an equilateral triangle measure 16 inches. The midpoints of the sides of the triangle are joined to form another equilateral triangle with sides that are half the length of the outer triangle. This process is continued until three triangles are inscribed in the first triangle. The sum of the perimeters of all four triangles is inches.

90 inches

Step-by-step explanation:

The side of a triangle is 16 inches in the length. The perimeter for the first triangle is 16 * 3 = 48. Then the triangle is connected with first triangle so the perimeter for the second triangle is 24. The triangle is inscribed and its midpoints are joined. The total perimeter is 90 inches for all the triangles.

add -60 to 120 which will result in : 2x+3y=180

then subtract 2x: 3y=-2x+180

lastly, divide by 2: y= -2/3x+60

hope this is the answer you're looking for: )