Answer:
The correct equation is 8.7 + b = 54.6
Step-by-step explanation:
because it is given that measure of side a is 8.7cm, in all other equations the values of a is different.
Answer:
x = 50
Step-by-step explanation:
the word bisects means that it cuts in half (this is how I understand it, not the official definition :D)
so that means

Answer: 3x+5
Step-by-step explanation:
3x+75/15=
1/15x(45x+75)=
1/15x15(3x+5)=
3x+5