Answer
$\color{blue}{-\dfrac{27}{4}\text{ or } -6.75}$
Work Step by Step
Evaluate using the PEMDAS rule for order of operations. The PEMDAS rule summarizes the order of operations:
First Priority; P - parentheses
Second Priority: E - exponents
Third Priorirty: M/D - multiplication or division, whichever comes first from the left
Fourth Priority: A/S - addition or subtraction, whichever comes first from the left
Simplify within grouping symbols first::
$=(-3)(-9)\div (-4)$
Multiply. Note that the product of two numbers with the same sign is positive.
$=27 \div (-4)$
Divide. Note that the quotient of two numbers with different signs is negative.
$=\color{blue}{-\dfrac{27}{4}\text{ or } -6.75}$
