Answer:
25-15=w;w=10
Step-by-step explanation:
25 is the most it can weigh, and 15 is how much it weighs at the moment. The w stands for how much the weight can go up.
Answer:
138/6=23
Step-by-step explanation:
Basic Equation for 180 angle.
I'll give you a hint. <u><em>You had to used pemdas stands for: p-parenthesis, e-exponents, m-multiply, d-divide, a-add, and s-subtracting.</em></u>
First you had to calculate with parenthesis first.

Then you add and subtract from left to right.

Final answer 
Hope this helps!
And thank you for posting your question at here on brainly, and have a great day.
-Charlie
11,111/12,500=8.888888 repeating
10:18 is an equivalent ratio.