Name the property of a quality that justifies the following statement:
if x=10, then x+y=10+y
a. reflexive property of equality
b. addition property of equality
c. transitive property of equality
d. substitution property of equality

b.

Step-by-step explanation:

its basically saying since x equals 10 and 10 is on both sides that if you add y to both sides itll still be equal hence, addition property of equality.

B Addition property of equality

Step-by-step explanation: the property: a=b, so a+c = b+c

(2,20) means that the 2 is 2 hours and 20 is 20$. so there both 20$ for 2 hours only the same price. like it says. so, the dunk tank and the bounce house are the same price (20$) for the same amount of time (2 hours).

hope i