Substitute the values in the expression
b-a=3-2=1
answer b-a=1
The number is (2√3) / 3
To find the missing number, convert what it says in words to an equation:

Divide both sides by 15:

Take the square root:
Answer:
#7 is 4.7
Step-by-step explanation:
Circumference is Pi x diameter
Your answer would be 60, you can multiply 15 by 4 to get that answer. If you plug in 60 for x it will work