Answer
$= 0.5t$
Work Step by Step
Use the distributive property to simplify the algebraic expression:
$-3t + 4.2t - 0.9t +0.2t$
$= t(-3 + 4.2 - 0.9 + 0.2)$
$= t (1.2 -0.7)$
$= t(0.5)$
$= 0.5t$
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