Answer:
Step-by-step explanation:
Fist you add -13 to 6y and than 4x that should be 69420
Answer:350km
Objective: Recall the properties.
a) 3+1=4
b) 3+7=7+3
c) 3+(7+4)=7+(3+4)
d). 3(7+4)=(3×7)+(3×4)