Combining Like Terms & Order Of Operations

Simplify

 $-9+12m-18-16m$  

• -4m-27

• 28m-9

• -4m-9

• 28m-27

Simplify

 $\left(8r+\left(-3\right)\right)+\left(-10r-9\right)$  

• -2r-12

• 18r-6

• 2r+12

• -18r+6

Simplify

 $4^2\div\left(2x2\right)-16+\left(-12\right)$  

Simplify  $\left(\frac{20}{4}+9\right)+2^3\times\left(-7\right)$