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Sphinxa [80]
2 years ago
8

Geometry help, please.

Mathematics
1 answer:
egoroff_w [7]2 years ago
3 0

Answer:

  80°

Step-by-step explanation:

The sum of the marked angles is 145°, so we have ...

  (4x+5)° +(6x -10)° = 145°

  10x -5 = 145 . . . . . . . . . . divide by °, simplify

  10x = 150 . . . . . . . . add 5

  x = 15 . . . . . . . . divide by 10

Then the measure of angle XMN is ..

  angle XMN = (6x -10)° = (6(15) -10)° = 80°

______

<em>Check</em>

angle ZMX = (4(15)+5)° = 65°

and 65° +80° = 145° . . . . as required

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a school custodian walks gymnasium floors measured 20 feet by 20 feet how many square feet did she have to work
Verizon [17]
Hi there.

Area = <em>lw</em>

So, since we have the dimensions, we can just use the formula.

20 · 20 = 400 ft²

Cheers~
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3 years ago
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Answer:

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Step-by-step explanation:

4 0
3 years ago
(8.6x107)-(9.1x10-8)simplify
natima [27]

Answer:

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Step-by-step explanation:

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<h3>Standard form</h3>

The numbers in standard form are ...

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In scientific notation, this is ...

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4 0
1 year ago
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Step-by-step explanation:

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7 0
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What number gives a result of -4 when 9 is subtracted from the quotient of the number and 5?
Vera_Pavlovna [14]
Answer:

25

Step by step:

1. prepare the equation

-4 = x/5 - 9

2. add 9 to both sides

-4 = x/5 - 9
+9 +9
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5 = x/5
(5) (5)
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4. x=25

Hope this helps
6 0
2 years ago
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