15.which property of addition is used in the following?(7+8)+4=7+(8+4).
a distributive property
b.commutative property
c.associative property
d.identify property.
16) which of the following does not show the commutative property?
a. xy=xy
b.x+y=y+x
c. yx=xy
d. a+3=3+a.
17)the _______property of multiplication states that any number multiplied to one is equals to the same number. a.commutative
b.associative
c.inverse
d.identify.
18)what is multiplicative inverse or reciprocal of -7?
a.-1/7
b.1/7
c.-7
d.7
19)the integers that are added or multiplied remain as integers.
a.distributive property
b.closure property
c.commutative property
d.associative property
20)fill the blank with a real number to make the equation true.7(___+2)= 21+14
a.3
b.2
c.1
d.4
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15.a
16.a
17.c
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