Question

1. evaluate: -6 - 3(4.5 - 8) - (-2 + 9)

Explanation:

Step1: Solve inner parentheses

$4.5 - 8 = -3.5$; $-2 + 9 = 7$
Expression: $-6 - 3(-3.5) - (7)$

Step2: Multiply terms

$3(-3.5) = -10.5$, so $-3(-3.5) = 10.5$
Expression: $-6 + 10.5 - 7$

Step3: Calculate left to right

$-6 + 10.5 = 4.5$
Expression: $4.5 - 7$

Step4: Final subtraction

$4.5 - 7 = -2.5$

Answer:

$-2.5$