Answer:
254
Step-by-step explanation:
see the picture for how I worked this out
Here is my answer. I left the latter question in a. as I don't actually know the answer. Anyway, I hope this is helpful although not complete.
Answer:
2A/h - b = c
Step-by-step explanation:
A = 1/2(b + c)h
Multiply each side by 2
2A = (b + c)h
Divide each side by h
2A/h = (b + c)h/h
2A/h = (b + c)
Subtract b from each side
2A/h -b = (b-b + c)
2A/h - b = c