Answer:
C
Step-by-step explanation:
57+57+34=148
(91.1061mm)First you need to find the hypotenuse which is the missing length on the triangle 20squared plus 21 squared is 841 then the square root of that (29) so the diameter is 29 multiply that by pi the you get the circumference 91.1061
1)u(a-5)+b(-5+a);2). b(8x-6y)+a(15y+20x). 3). I have no idea for the third one....
Answer:take 1200 and take away 3
Step-by-step explanation: 1200-3