Step-by-step explanation:
a. true
property: identity
b. false
property: communitive
c. true
associative
d. false
property: multiplication property of zero
Answer:
311333
3(a+4b)
3×a+3×4b=3a+12b
3a+12b=3a+12b
7000
y^12/5
(9x^(5)y^(16))/(45x^(5)y^(4))
3.
3m^2-3n^2= 3(m^2-n^2) = 3 (m+n)(m-n)
6m-6n= 6 (m-n)
3(m+n)~(m-n)~/6~(m-n)~ = (m+n)/2
