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KatRina [158]
3 years ago
13

Solve: 2x - 3 = 2x - 5. A) -2 B) 0 C) 5 3 D) no solution

Mathematics
2 answers:
rjkz [21]3 years ago
5 0

D.) No solution

2x - 3 = 2x -5

That is because it they were to be equal to each other it would be either

2x - 3 = 2x - 3 or

2x - 5 = 2x -5

- 3 cannot be equal to -5

2x is in both the equation so they cannot be equal to each other

dezoksy [38]3 years ago
4 0

2x -2x - 3 = 2x - 2x - 5        <em>subtract 2x from both sides</em>

-3 = -5    FALSE

<h3>Answer: D) no solution</h3>
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I don’t understand how to proof Cpctc or answer the questions
n200080 [17]
I think that first you need to understand what CPCTC is used for.

Let's start with the definition of congruent triangles.

Definition of congruent triangles
Two triangles are congruent if each side of one triangle is congruent to a corresponding side of the other triangle and each angle of one triangle is congruent to a corresponding angle of the other triangle.

A definition works two ways.
1) If you are told the sides and angles of one triangle are congruent to the corresponding sides and angle of a second triangle, then you can conclude the triangles are congruent.
2) If you are told the triangles are congruent, then you can conclude 6 statements of congruence, 3 for sides and 3 for angles.

Now let's see what CPCTC is and how it works.
CPCTC stands for "corresponding parts of congruent triangles are congruent."
The way it works is this. You can prove triangles congruent by knowing fewer that 6 statements of congruence. You can use ASA, SAS, AAS, SSS, etc. Once you prove two triangles congruent, then by the definition of congruent triangles, there are 6 congruent statements. That is where CPCTC comes in. Once you prove the triangles congruent, then you can conclude two corresponding sides or two corresponding angles are congruent by CPCTC. These two corresponding parts were not involved in proving the triangles congruent.

Problem 1.

Statements                                        Reasons
1. Seg. AD perp. seg. BC               1. Given
2. <ADB & <ADC are right angles     2. Def. of perp. lines
3. <ADB is congr. <ADC                 3. All right angles are congruent
4. Seg. BD is congr. seg CD           4. Given
5. Seg. AD is congr. seg. AD        5. Congruence of segments is reflexive
6. Tr. ABD is congr. tr. ACD           6. SAS
7. Seg. AB is congr. seg. AC        7. CPCTC

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Drag the dots to plot (7 1/2, -2) (-3,7) and (2,0)
kirill115 [55]

Step-by-step explanation:

7 1/2 = 7 + 1/2 = 14/2 + 1/2 = 15/2 = 7.5

check the attached picture.

:)

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3 years ago
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butalik [34]
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4 0
3 years ago
Solve the given quadratic equation 2x2 + x + 1 = 0.
Ivan

Answer:

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