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olasank [31]
3 years ago
10

Gia got some books from Library yesterday she got five books today Gia returned three books Gia has six books how many books did

gia have to begin
Mathematics
1 answer:
makvit [3.9K]3 years ago
6 0

Answer: 4


Explanation:


You can write an algebraic expression to represent the sequence with the books in this way:

  • yesterday she got five books: 5
  • today returned three books: - 3
  • how many books did Gia have to begin: n
  • At the end she has six books, which means that you can set an equality:

       n + 5 - 3 = 6

Now you follow these steps to clear the unknown:

  • do the operations in the left side: n + 2 = 6
  • use subtraction property of equality: n = 6 - 2
  • do the operations: n = 4

And that is the number of books whith which Gina started: 4

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Find the measures of the angles of an isosceles triangle with a vertex angle of 42 degrees
I am Lyosha [343]

Answer:

69°, 69°, and 42°

Step-by-step explanation:

Isosceles triangles have three angles -- one vertex angle and two base angles.

The <u>base angles have the same measure</u> and the vertex angle has a different measure.

<u>Remember all triangles' interior angles sum to 180°.</u>

If the vertex angle is 42°, then the two base angles combined are:

180° - 42° = 138°

Since the base angles are the same, <u>each base angle is:</u>

138° ÷ 2 = 69°

Therefore the angles in the triangle measure 69°, 69°, and 42°.

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3 years ago
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babunello [35]
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Answer:

The equation of the line is x = 2

Step-by-step explanation:

* It is a coordinate geometry problem.

 We need to find the equation of a line with undefined slope.

* The slope is undefined

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* The rule to find the slope is \frac{y_{2}-y_{1}}{x_{2}-x_{1}}

 The slope is undefined if x_{2}-x_{1}=0

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