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denis23 [38]
3 years ago
13

Select the correct answer how many solutions for x dose the following equation have 2(x+4)-1=2x+7

Mathematics
1 answer:
gavmur [86]3 years ago
5 0

Answer:

every number is correct.

Step-by-step explanation:

2 (x + 4) - 1 = 2x + 7

2x + 8 - 1 = 2x + 7

2x + 7 = 2x + 7

     - 7          - 7

2x = 2x

/2     /2

x = x

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For how many positive integers n is it possible to have a triangle with side lengths five, 12, and n
Andre45 [30]

Step-by-step explanation:

you know, a single side cannot be longer than the other 2 sides combined.

otherwise, the triangle cannot "close".

so, it starts with 12 cannot be longer than 5 + n.

therefore, n must be at least 7.

and n cannot be longer than 5+12 = 17

7 and 17 I would normally rule out a well, because in these cases the triangle would just be a flat line, when the 3rd side is as long as the other 2 combined.

so, in reality for a real, visible triangle, the range of valid values is 8 .. 16.

that is 9 positive integer values.

8 0
2 years ago
A thermometer reading 5 degrees celsius is brought into a room with a constant temperature of 35 degrees celsius.
Softa [21]
If it starts at 5 degrees celsius and raises to 15 degrees celsius in 3 minutes it increases by about 3 1/3 every minute.
times that by 5 and you get 16 2/3. times that by 10 and you get 33 1/3
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3 years ago
Write a problem that includes multiplying decimals . Explain how you know where to place the decimal in the product.
loris [4]
Maya is making dream catchers with her family. Each dream catcher takes 1.53 feet of string. She has 6 people in her family. How much string does Maya need total?

1.53*6=9.18

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Charles wants to find out if the students in foreign language classes spend more time in class speaking in English or in the for
Nuetrik [128]

C. The way the sample was chosen may overrepresent or underrepresent students taking certain language classes.

The samples he chose may not be a representative sample because the number of students per foreign language class may not be the same. Since classes have different numbers of students, one may have a very large number of students while another may have only a few. Taking equal number of students per class is not a representative sample because it doesn't represent the students correctly.

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Read 2 more answers
Use the image below to answer the following parts.
12345 [234]

Answer:

Step-by-step explanation:

Part A

Since, the given angles are formed at a point are on a straight line, sum of these angles will be 180°.

Part B

(3x - 5)° + (4x + 2)° + (2x + 3)° = 180°

9x = 180

x = 20

Part C

m∠ADB = (3x -  5)°

             = (3×20 - 5)°

             = 55°

m∠DBK = (4x + 2)°

             = (4×20 + 2)°

             = 82°

m∠KBC = (2x + 3)°

             = (2×20 + 3)°

             = 43°

6 0
3 years ago
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