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Vikki [24]
3 years ago
13

Liz simplified the expression 5x - 3(4 - x) and got 2x -12. Did she simplify the expression correctly? Explain how you know.

Mathematics
1 answer:
Orlov [11]3 years ago
5 0

Answer:

Step-by-step explanation:

Incorrect. She forgot to change the sign while distributing.

5x - 3(4-x) = 5x - 12 + 3x = 8x - 12

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Step-by-step explanation:

Really weird that y is the number of years but ok

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A caterpillar moves across the grass at a rate of 423 feet every 7 minutes. How fast does the caterpillar move in feet per minut
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The length of a rectangular room is 8 feet more than twice the width. If takes perimeter of the room is 124 feet, what are its d
Vlad1618 [11]

Hey there! I'm happy to help!

Let's call the length and width L and W respectively.

L=2W+8

2W+2L=124

We plug our value of L into the second equation and solve for W.

2W+2(2W+8)=124

We undo the parentheses with the distributive property.

2W+4W+16=124

Combine like terms.

6W+16=124

Subtract 16 from both sides.

6W=108

Divide both sides by 6.

W=18

We plug this W value into the first equation to solve for L.

L=2(18)+8

L=36+8

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So, the length is 44 feet and the width is 18 feet.

Have a wonderful day! :D

8 0
3 years ago
How many 1/2 foot pieces can be cut from 6 foot ribbon?
MatroZZZ [7]
Number of ribbons that can be cut = 6 ÷ 1/2 
Number of ribbons that can be cut = 6 x 2/1
Number of ribbons that can be cut = 12 

 -----------------------------------------------------------------------------------------
Answer: 12  1/2 foot pieces can be cut from 6 feet ribbon
 -----------------------------------------------------------------------------------------

8 0
3 years ago
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