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serious [3.7K]
3 years ago
11

What are the roots of the quadratic equation below 2x ^ 2 - 12x + 13=0 PLEASE HELP

Mathematics
1 answer:
kozerog [31]3 years ago
3 0

Answer:

 

Step-by-step explanation:

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3 years ago
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

L=44

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

Have a wonderful day! :D

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3 years ago
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Makovka662 [10]

Answer:

Train A - 50 miles per hour

train B - 30 miles per hour

Step-by-step explanation:

Let x mph be the speed of the train B, then the speed of the train A is (x+20) mph.

In 3 hours,

  • train A travels 3(x+20) miles
  • train B travels 3x miles

In total, they covered the distance of 240 miles, so

3(x+20)+3x=240\ \ \ \text{[Divide by 3]}\\ \\x+20+x=80\\ \\2x=80-20\\ \\2x=60\\ \\x=30\ mph\\ \\x+20=30+20=50\ mph

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3 years ago
a furniture shop refinishes cabinets. employees use one of two methods to refinish each cabinet. method 1 takes .5 hours and mat
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yuradex [85]

Answer:

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2=9+z

3=9/z

4=9z

Step-by-step explanation:

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3 years ago
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