Identifying Expressions

In this expression, which terms can be combined to generate an equivalent expression?
    12c+15c²- 3+4c

• 12c, 15c² and 4c

• 12c and 3

• 12c and 4c

Which numerical expression is equivalent to 12²?

• 12 x 12

• 144n

• 12x2

• none of the above

Which property of operations was used to show these expressions are equivalent?
17y+4+12y= 4+12y+17y

• commutative property of multiplication

• commutative property of addition

• associative property of addition

How would an equivalent expression be written for this expression if the distributive property was used?
  14x + 21y

• 7+(2x+3y)

• 21+y+14x

• 21y+14x

• 7(2x +3y)

Which expression is equivalent to 5 x 7h if using the commutative property?

• 7h x 5

• 35h

• 12h

• none of the above

Is 20b+16c  equal to 4(4b+5c)?

• yes

• no

5 more than 2 times a number

• 5x - 2

• 2x + 5

• 2 + 5x

• 2x - 5

7 less than 5 times a number

• 5x - 7

• 7 - 5x

• 5x + 7

• 7x - 5

5 times a number decreased by 2

• 5x + 2

• 2 + 5x

• 2 - 5x

• 5x - 2

2 diminished by 7 times a number  

• 2x - 7

• 2 + 7x

• 2 - 7x

• 7x - 2