Mr. Littles is building a triangular sandbox using three boards. He already has two boards that measure 9 feet and 12 feet. Select all of the values that could represent the length of the third board of his triangular sandbox.

9 feet, 15 feet, 19 feet

Step-by-step explanation:

Options are:

2 feet 3 feet 9 feet 15 feet 19 feet 21 feet 30 feet

Use the triangle inequality theorem: sum of any two side must be greater than the third side by length

2 feet     ⇒  no, as 2 + 9 < 123 feet     ⇒  no, as 3 + 9 = 129 feet     ⇒  yes15 feet    ⇒  yes19 feet    ⇒  yes21 feet    ⇒  no, as 9 + 12 = 2130 feet  ⇒  no, as 9 + 12 < 30

Answer for 2: his profit would be $2.88 explanation: you have to first multiply 72 and 0.12 together to get $8.64 once you do that you know how much money the shopkeeper made from selling the candy bars individually. so you have to do 8.64-5.76=2.88 hope that ; )answer for 3: yeah i’m sorry i have no idea what number 3 is. i’m sorry i couldn’t with that.