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2 years ago

11

Jenna wants to make a park bench as part of her family's miniature railroad train display. If the display is built to scale wher

e 2 cm = 1 ft and Jenna is modeling her bench after a bench with a length of 4 ft what will the length of Jenna's model be?

1 answer:

Savatey [412]2 years ago

6 0

Answer:

8cm

Step-by-step explanation:

2 cm =1 ft so if i multiply it by 4ft, and remember 2 cm =1 ft so 2×4=8

8cm

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3 years ago

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A.
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B.
$3(2x-4)=5x-1 \\
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\boxed{x=11} \Leftarrow \hbox{the second mistake}$

Megan's solution isn't correct.
The first mistake: she subtracted 5x from the right-hand side of the equation, but added 5x to the left-hand side.
The second mistake: she divided the right-hand side of the equation by 11, but didn't divide the left-hand side.

The correct solution:
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3 \times 2x+3 \times (-4)=5x-1 \\ 6x-12=5x-1 \ \ \ \ \ \ \ \ \ \ \ \ \ \ |\hbox{subtract 5x from both sides} \\
x-12=-1 \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ |\hbox{add 12 to both sides} \\
x=11$

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3 years ago

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snow_tiger [21]

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