Read the following statement: x + 6 = 6 + x. this statement demonstrates:

the substitution property.
the reflexive property.
the symmetric property.
the transitive property.

Sarah took the advertising department from her company on a round trip to meet with a potential client. including sarah a total of 11 people took the trip. she was able to purchase coach tickets for $280 and first class tickets for $1280. she used her total budget for airfare for the trip, which was $6080. how many first class tickets did she buy? how many coach tickets did she buy?

Ntriangle abc, m∠a = 35° and m∠b = 40°, and a=9. which equation should you solve to find b?

A+b= 17, ab=70, find the value of |a-b|