Answer:
93
Step-by-step explanation:
B
each side is 31cm
91/3=31
31+31+31=93
A. 19 degrees.
Answer:r-1
(-r-5)-(-2r-4) Or (-r-5)-(-2r-4)
-r+-5+2r+4. -r-5+2r+4
r-1 r-1
You bring down the first Parentheses Then have to multiply the (implied 1) -1•-2=2 and -1•-4=4 and do the math regularly