Answer:
I need a graph paper and to record a video to show you this, but it's

This is incorrect
-a = b
a + c = d
b + c = d is incorrect because it says a + c and not -a + c.
If you multiply the first line with -1 then you would get a = -b
So the final line would actually be -b+c=d
The correct answer would be C.
Answer:
6
Step-by-step explanation:
The formula for finding the volume of a rectangular prism is lwh so u multiply 3 and 4 which is 12 and divide 72 by 12.
Answer:
100π
Step-by-step explanation:
The equation of the circumference of a circle is C=2πr.
So to get an answer that not rounded you would keep the π and multiply 50 by 2= 100