Jose solved the following problem using the work shown. which property did he not use? 19 + (1 + 0) = (19 + 1) + 0 = 20 + 0 = 20 a. identity property b. associative property c. commutative property

 commutative property

Step-by-step explanation:

answer: i'm not going to give you the answer, but some hints to work it out.

step-by-step explanation: so, if there is a straight line that means that the line angle is 180°. so we subtract the 2 angle measures provided, (15 and 38) from 180. so the answer is 180 - (38 + 15). (you have to solve the equation)

ruth is 6 years old

step-by-step explanation:

6 + 24 = 30,   so 6/30 = .2  

if you do 1/5 it also equals .2, so that is the answer.