First looks more bell than anything, second, there are 18-time trials, third, I'm not completely sure.
Answer:
Heating and cooling costs might vary considerably.
Answer:
B
Step-by-step explanation:
A rhombus is divided into four congruent triangles. The two given angles are complementary, meaning they add up to 90 degrees. Set up an equation:

Take out the parentheses
Combine like terms
Add 25 to both sides so as to isolate the variable
Divide both sides by 5
Answer:
Step-by-step explanation:
17+3=20/2
mean=10