I do not understand ur language I speak English very well sorry I can't help you with your homework
Answer:

multiply either sides by 3:

divide either sides by πr² :

Is there a picture? there's not enough info
A) Grace is 20
B) Grace is p+5
C) Nicole is q-5
Answer:
Step-by-step explanation:
3g + 2h = 3*7 + 2*5
= 21 + 10
= 31