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8:59 PM Thu Feb 20 Emilio Mejia Felici... R. 5 Evaluate multi-variable expressions Video 03:56 v Evaluate the expression for \( w=9 \) and \( x=4 \). \[ w x+w= \] \( \square \) Submit Not ready yet?
Ask by Bird Huff. in Puerto Rico
Feb 21,2025
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When \( w=9 \) and \( x=4 \), the expression \( wx+w \) equals 45.
Solución
Substitute \( w=9 \) and \( x=4 \) into the expression \( wx+w \).
Evaluate the expression by following steps:
- step0: Evaluate:
\(wx+w\)
- step1: Substitute:
\(9\times 4+9\)
- step2: Multiply the numbers:
\(36+9\)
- step3: Add the numbers:
\(45\)
When \( w=9 \) and \( x=4 \), the expression \( wx+w \) evaluates to 45.
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To evaluate the expression \( wx + w \) for \( w = 9 \) and \( x = 4 \), first substitute the values into the expression. This gives you \( 9 \cdot 4 + 9 \). Then, calculate \( 9 \cdot 4\) which equals 36, and finally add 9 to that result. So, \( 36 + 9 = 45\). In multi-variable expressions, remember the order of operations (PEMDAS/BODMAS). Multiply first, then add. It's a common mistake to add before multiplying. Always double-check your calculations to avoid simple errors, especially under time pressure!
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