Well idk what the numbers are, but the formula to find the are is 3.14(pi) x r^2
Answer: Please rewrite your question or send a pic. It is not clear what you are asking.
Step-by-step explanation:
25/100 also 1/4
they are the same fraction, one of them is just simplified
Answer:

Step-by-step explanation:

Move 3k to left hand side and change it's sign
Similarly, move 4.5 to right hand side and change it's sign

Collect like terms

Subtract 4.5 from 18

Divide both sides by 4.5

Calculate

Hope I helped!
Best regards! :D