Please help me with this quickly and explain your answer

D. x = 10

Step-by-step explanation:

Perimeter = the sum of all sides lengths

Perimeter = 30 (in this case)

so...

Step 1. Dividing 3 to both sides

Step 2. Add 5 to both sides

Step 3. Solve for x

Since x + x = 20, to solve for one of the x means solving for the other x

so since 2 x's are being added with the same value, divide 20 by 2.

x = 10

auto insurance

step-by-step explanation:

answer: all of the odd numbers were opened

the first person was the one that was opening all of the lockers. since one is odd, this causes all of the odd number lockers to be opened in the end.