A*5+b*2=145
a +b =50 | * -2
5a +2b=145
-2a -2b = -100
----------------------
5a-2a = 145-100
3a= 45
a=45:3
a=15 questions are worth 5 p
b=50-15=35 questions worth 2 p
Answer: 
Step-by-step explanation:
I believe you're trying to find its volume.


Answer:
it's the first answer
Step-by-step explanation:
literally every other answer is ruled out because D is the greatest variable and can't be smaller than anything else
R divided by 9 is the answer.
Answer:
6x-2y=13 is x=
solved for x
6x-2y=13 is y=
solved for y
2x+3y=-3 is x =
solved for x
2x +3y=-3 is y=
solved for y
Step-by-step explanation: