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vlada-n [284]
2 years ago
15

Brainiest for correct answer

Mathematics
2 answers:
katrin [286]2 years ago
8 0

Answer:

a- 76

b- 123

c- 123

Step-by-step explanation:

yarga [219]2 years ago
3 0

Answer:

angle a = 104 degrees, angle b = angle c = 123 degrees

Step-by-step explanation:

angle c = 180 - 57

angle c = 123 degrees

angle a = 180 - 76

angle a = 104 degrees

angle b = 180 - 57

angle b = 123 degrees

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Factor u⁴+7u²-8
nirvana33 [79]

Answer:

(u + 1)(u - 1)(u² + 8)

Step-by-step explanation:

<u>Here is the steps:</u>

  • u⁴ + 7u² - 8 =
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The recyclables have been sorted into plastic and glass. The number of plastic items is 30 less than nine times the number of gl
Colt1911 [192]

Answer:

  B,  9

Step-by-step explanation:

Let g represent the number of glass items. Then the number of plastic items is (9g -30). If 85% of items are plastic, then 100%-85% = 15% of items are glass. The ratio of plastic to glass is ...

  85%/15% = (9g -30)/g

  17/3 = 9 -30/g . . . . simplify

  30/g = 9 -17/3 = 10/3 . . . . . . add 30/g -17/3

  g = 30(3/10) = 9 . . . . . . . . . . multiply by 3g/10

There are 9 glass items.

_____

<em>Additional comment</em>

The number of plastic items is 9(9) -30 = 51, and the total number of items is 51+9 = 60. The percentage of plastic items is 51/60 = 85%.

__

There are many other ways the equation(s) could be written, including using a system of two equations. For example ...

  • p = 9g -30
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6 0
2 years ago
Which of the following uses the associative property of addition to simplify? Select all that apply.
garri49 [273]
Idk which one ur taking about
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3 years ago
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