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Zarrin [17]
1 year ago
14

during one semester, the time elaine spent doing homework or participating in extracurricular activities was 20 percent less tha

n the time she spent attending class. if she spend a total of 981 hours attending class, doing homework, or participating in extracurricular activities, how many hours did she spend attending class?
Mathematics
1 answer:
polet [3.4K]1 year ago
7 0

Answer:

963 hours

Step-by-step explanation:

I subtracted 20 from the 981

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A(n) = a₁.(r)ⁿ⁻¹, where a₁ = 1st term, r= common ratio and n, the rank

In the formula given a₁ = 5, r = 3/2 and n = 6 (we have to find the 6th term value).

a₆ = 5.(3/2)⁶⁻¹ = 5.(3/2)⁵ = 1215/32 (answer C)
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W = 2.5d + 62

Step-by-step explanation:

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2 years ago
Can lengths 7,1,7 form a triangle
Vadim26 [7]

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Yes

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2 years ago
What is 4c + 8c = -55 + 3c
Rzqust [24]

To solve this, you need to isolate/get the variable "c" by itself in the equation:

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2 years ago
Choose all the rigid mapping rules that hold congruence.
Ulleksa [173]

Rigid mapping is used to illustrate rigid transformation.

The rigid mapping rules are:

  • <em>(a) (x, y)->(y,x)   </em>
  • <em>(c) (x, y)->(-y, x) </em>
  • <em>(d) (x, y)-> (-y +4, X-6) </em>
  • <em>(e) (x, y)->(x + 4, y-5) </em>
  • <em>(f) (x, y)->(x, x+y) </em>

<em />

All transformations are rigid except dilation.

This is so, because dilation <em>changes the size </em>of the function that is being transformed, while others do not.

Dilations are represented by scale factors (<em>product or division</em>)

From the list of given options

<em>(b) (x, y)->(3x, y) and (c) (x,y)-> (3)</em> are non-rigid mapping because they represent dilations.

Hence, the rigid mapping rules are:

  • <em>(a) (x, y)->(y,x)   </em>
  • <em>(c) (x, y)->(-y, x) </em>
  • <em>(d) (x, y)-> (-y +4, X-6) </em>
  • <em>(e) (x, y)->(x + 4, y-5) </em>
  • <em>(f) (x, y)->(x, x+y) </em>

<em />

Read more about transformation at:

brainly.com/question/13801312

6 0
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