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horrorfan [7]
3 years ago
6

Help me with this please

Mathematics
1 answer:
inessss [21]3 years ago
3 0

Answer:

115

Step-by-step explanation:

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The freezing point of nitrogen is about -210°C. The freezing point of mercury is about 171°C higher. What is the approximate fre
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It should be about -39 degrees.
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Jerry is paid $10.40 an hour for regular-time work. What is Jerry’s time and a half rate an hour? What is his double time pay ra
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Answer: Time and half---$15.60

Double time--$20.80

Step-by-step explanation:

TIME AND A HALF

$10.40/2= $5.20

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DOUBLE TIME

$10.40 x 2 =$20.80

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Evaluate 5 +(-4) + (-7) + 2
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Answer:

Step-by-step explanation:

+ - = -

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2 years ago
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An 8-car Ferris wheel is shaped like a regular octagon. Does the Ferris wheel have rotational symmetry?
VikaD [51]

Answer:

Yes, it does.

Step-by-step explanation:

Every regular shaped figure will have rotational symmetry, since they are built with identical segments all around.

To find the answer, ask yourself « If I rotate the shape, is there a time where I’ll find the exact same shape again with a different angle? »

So, a square has rotational symmetry, but not a rectangle.

A equilateral triangle has rotational symmetry, but not any other type of triangle.

4 0
3 years ago
Find the solution of 2x+2y=10 and x=5y+20
Sever21 [200]

Answer:

(15/2, -5/2)

Step-by-step explanation:

1. Sub x=5y+20 into 2x+2y=10 and simplify as shown below.

  2(5y+20)+2y=10

  10y+40+2y=10

  12y+40=10

  12y=-30

  y=-30/12

  y=-5/2

2. Sub in y=-5/2 into 2x+2y=10 to find x and simplify as shown below.

  2x+2(-5/2)=10  

  2x-5=10

  2x=15

  x=15/2

8 0
2 years ago
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