9514 1404 393
Answer:
   a. x, x+2, x+4
   b. 10 ≤ 3x+6 ≤ 24
   c. 6 ft, 8 ft, or 10 ft
Step-by-step explanation:
<u>Given</u>:
- The lengths of the sides of a certain triangle, in feet, are consecutive even integers.
- The perimeter of this triangle is between 10 feet and 24 feet inclusive. 
<u>Find</u>:
   a. Using one variable, write three expressions that represent the lengths of the three sides of the triangle. 
   b. Write a compound inequality to model this problem. 
   c. Solve the inequality. List all possible lengths for the longest side of the triangle.
<u>Solution</u>:
You have let x represent the shortest side. (Note that the question asks for the length of the longest side.)
a. The expressions for side lengths can be x, x+2, x+4 when x is the shortest side.
__
b. Here is the compound inequality
   10 ≤ x+(x+2)+(x+4) ≤ 24
__
c. Here is the solution
   10 ≤ 3x+6 ≤ 24 . . . . collect terms
   4 ≤ 3x ≤ 18 . . . . . . . subtract 6
   4/3 ≤ x ≤ 6 . . . . . . . . divide by 3
<em>Your working is correct, but incomplete</em>. The values of interest are the even integers x+4.
   5 1/3 ≤ x+4 ≤ 10
The longest side may be 6 ft, 8 ft, or 10 ft.