8-(8+48) = -48 then divide that by 8 and you get -6 as your result
1)
b: 3.75 since it is half of the segment that measures 7.5, this is proven because the line in the middle is a bisector of the top and bottom line indication that both half measure the same; 3.75
2) 15 not sure why
For this, all you need to do is subtract 2m on both sides, and your answer will be: -1 = m
The answer is -12. R times -6 is -18 and -18 plus -6 is -12
Without rounding to the nearest tenth, it would be 7.28. Rounding it would give you with an answer of 7.3 with rounding.