1. The lengths of the sides of isosceles triangle $\triangle ABC$ are $3x+62$, $7x+30$, and $5x+50$ feet. What is the least possible number of feet in the perimeter of $\triangle ABC$?
2. A $100$-foot rope is cut into three pieces. The first piece is three times as long as the second, and the third piece is $20$ feet shorter than the second. How many feet long is the shortest piece?
For number 2) We use algebra. Pretend the second piece is X. The first piece would be 3x, and the third would be x-20. Add these all up, you get 5x-20. 5x-20 is equal to 100 feet. Therefore, 5x=120 feet. So, x=24 feet. The second piece is 24 feet. We minus 20 from 24 and the shortest piece is 4 feet
1) Alright we have 3 possibilities. 3x+62=7x+30, 7x+30=5x+50, or 5x+50 = 3x+62. Lets see the first one.
First one: If 3x+62=7x+30, 32=4x. x=8, and the perimeter would be: 24+62+56+30+40+50, or 272.
Second one: 7x+30=5x+50. x=10. 100+100+92= 292.
Third one: 5x+50 = 3x+62. x=6. 80+80+72 = 232. So the least possible feet is 232.
For number 2) We use algebra. Pretend the second piece is X. The first piece would be 3x, and the third would be x-20. Add these all up, you get 5x-20. 5x-20 is equal to 100 feet. Therefore, 5x=120 feet. So, x=24 feet. The second piece is 24 feet. We minus 20 from 24 and the shortest piece is 4 feet
1) Alright we have 3 possibilities. 3x+62=7x+30, 7x+30=5x+50, or 5x+50 = 3x+62. Lets see the first one.
First one: If 3x+62=7x+30, 32=4x. x=8, and the perimeter would be: 24+62+56+30+40+50, or 272.
Second one: 7x+30=5x+50. x=10. 100+100+92= 292.
Third one: 5x+50 = 3x+62. x=6. 80+80+72 = 232. So the least possible feet is 232.