All I can say is 1 and 2 are correct.
Answer:
The correct answer for the second one is,

Answer:
Ricardo hiked 29 miles.
Step-by-step explanation:
10 6/11 x 2 3/4
convert
116/11 x 11/4 = 1276/44
1276/44 = 29
Answer:
PEMDAS
Step-by-step explanation:
P=Parenthesis
E=Exponent
M=Multiply
D=Division
A=Addition
S=Subtract
It's not c so it mite be eather b or a I would say its b