Answer
$$13.6$$
Work Step by Step
Step 1:
Substitute $x=-1$ and $y =5$.
So,
$(2.4-x)(x-xy)$
$(2.4-(-1))(-1-(-1*5))$
Step 2:
Remember the order of operations:
Parenthesis, Exponents, Multiplication/Division and Addition/Subtraction
So first,
Parenthesis
$(2.4+1)(-1+1*5)$
Step 3:
Next,
Multiplication
$(2.4+1)(-1+5)$
Step 4:
Next,
Addition and Subtraction
$(3.4)(4)$
Step 5
Finish the multiplication.
$13.6$
