Math 7 - 2nd 9 weeks review

 $\frac{a+4b}{a+b}$  if a = -4 and b=3

• 0

• 8

• -24

• -8

 $-4\left(w^3-x\right)$  if w=3 and x=9

• 12

• 0

• -72

• 14

 $2x+3y$  if x=2 and y=3

•  $4x-6y$  

•  $xy-7$  

•  $xy+7$  

•  $4x+6y$  

What property is this?  $4\times0=0$  

• multiplicative property of zero

• multaplicative identity property

• additive inverse property

• additive property of addition

 $-2x+7$  when x= -4

• 0

• 1

• 15

• 2

 $3x-6$  when x= -3

• 12

• 3

• -10

• -15

 $-2p+7$  when p= -4

• 15

• -15

• 0

• -1

 $-3w+5$  when w=5

• 15

• -10

• 10

• -15

When x=13 and y=7, which expression is equal to 27?

• $2x+y$

• $2\left(x+y\right)-1$

• $3x-3y$

• $x+2y$

When x=3 and y=5, which expression is equivalent to $\frac{x+y}{2}$  

•  $x+y-3$  

•  $3x-y$  

•  $y-x+3$  

•  $3y-x$