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How do you write an algebraic expression that models the word phrase "twice the sum of 27 and matt's weight"?

1 Answer

Oct 2, 2016

If you are using an unknown value, use a variable and define whatit stands for.
Let Matt's weight be $w$ $w$

Look for the clues ...
$\to$ $rarr$ 'twice' means times by 2.
$\to$ $rarr$ 'sum' means add, It is used with AND, to tell you what to add together.

In this case, the main operation is addition.
Then that needs to be multiplied by 2

$? ? + ? ?$ $?? + ??$

$27 + w \leftarrow$ $27 + w" "larr$ the sum of 27 and Matt's weight

$2 (27 + w) \leftarrow$ $2(27+w)" "larr$ twice the sum of 27 and Matt's weight

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