Question

Which is an example of the Symmetric Property?

if 3x + 2 = a + 6, then a + 6 = 3x + 2
if a = b and b = 5, then a = 5
if y = 6, then y + 12 becomes 6 + 12
x + 2 = x + 2 ***
2. To properly use the Addition Property of Equality what number would have to be added in the equation, 14 = x – 6 ?
–14
14 ***
–6
6
3. The Reflexive Property of Equality says:
for any numbers a and b, if a = b then b = a
for any numbers a, b, and c, if a = b then a – c = b – c
for any numbers a, b, and c, if a = b then a + c = b + c ***
for any number a, a = a
4. The equation y – 9 + 9 = –17 + 9 is an example of which property of equality?
Substitution Property of Equality ***
Addition Property of Equality
Reflexive Property of Equality
Symmetric Property of Equality
5. Evaluate the expression 3x + (z + 2y) – 12, if x = 3, y = 8 and z = 5.
–116
18 ***
53
42

Answer 1

#1,3 you have symmetric and reflexive confused
#2 nope. Add 6 if you want to find x
#4 addition property -- note that 9 has been added to both sides
#5: 3*3 + (5 + 2*8) = 9 + 5+16 = 30
I suspect a typo

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