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serious [3.7K]
3 years ago
5

Please answer this correctly

Mathematics
2 answers:
Elena-2011 [213]3 years ago
4 0

Answer:

4 pieces of paper

There are 36 inches in 3 ft so 36/9=4.

IceJOKER [234]3 years ago
3 0

Answer:

4 pieces of paper

Step-by-step explanation:

There are 12 inches in a foot, so the banner is 36 inches long.

Divide 36 by 9 to find the number to pieces needed.

36/9=4

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P(A=0.20 and P(B) = 0.05
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haley spent 1/2 of an hour playing on her phone. that used up 3/8 of her battery. how long would she have to play on her phone t
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3 years ago
URGRENNTTT PLSS HELPP 50 POINTSS!!!!! Students were asked to simplify the expression cotangent theta plus tangent theta over cot
Naddika [18.5K]

The student that simplified the expression incorrectly is student 2

<h3>How to determine the incorrect result?</h3>

The steps are given as:

\frac{\cot(\theta) + \tan(\theta)}{\cot(\theta)}

Student 1:

  • Step 1: \frac{\cot(\theta)}{\cot(\theta)} + \frac{\tan(\theta)}{\cot(\theta)}
  • Step 2: 1 + \frac{\tan(\theta)}{\cot(\theta)}
  • Step 3: 1 + tan²(Ф)
  • Step 4: sec²(Ф)

Student 2:

  • Step 1: \frac{\cot(\theta)}{\cot(\theta)} + \frac{\tan(\theta)}{\cot(\theta)}
  • Step 2: \frac{1 +  \tan^2(\theta)}{\cot(\theta)/\tan(\theta)}
  • Step 3: sec²(Ф)/tan²(Ф)
  • Step 4: csc²(Ф)

As a general trigonometry rule;

\frac{\cot(\theta) + \tan(\theta)}{\cot(\theta)} = \sec^2(\theta)

This means that student 1 is correct, while student 2 is not

The first error in student 2's workings is in step 2, where we have:

\frac{\cot(\theta)}{\cot(\theta)} + \frac{\tan(\theta)}{\cot(\theta)} = \frac{1 +  \tan^2(\theta)}{\cot(\theta)/\tan(\theta)}

The above expression is not justified and cannot be proved by any trigonometry rule

Since the step 2 is incorrect, the other steps cannot be used.

Hence, the student that simplified the expression incorrectly is student 2

Read more about trigonometric expressions at:

brainly.com/question/8120556

#SPJ1

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Using symmetry concepts, it is found that there is a line of symmetry at x = 50, option D.

  • A line symmetry is an imaginary line that runs through a graph, dividing it into two equal parts.
  • A point symmetry is when every point is equidistant to the line of symmetry, but in opposite directions.

  • In this problem, the values of x range from 0 to 100, being divided(definition changed) at 50, thus, there is a line of symmetry at x = 50, and option D is the correct one.

A similar problem is given at brainly.com/question/16679081

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if two opposite sides of a rectangle increase in length, how must the other two opposite sides change if the area of the rectang
Ann [662]

If you want to increase two opposite sides of a rectangle you're going to have to always decrease the remaining two sides by 20% to keep the area the same.

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