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vlabodo [156]
3 years ago
9

What is the value of x? Enter your answer in the box. x =

Mathematics
2 answers:
deff fn [24]3 years ago
5 0

Answer:

21

Step-by-step explanation:

The sum of degrees in a triangle is 180, so we have:

3x+100+x-4=180

add 4 on both sides

3x+100+x=184

subtract 100 on both sides

3x+x=84

Combine like terms

4x=84

84/4 = 21

(btw i'm actually 10 years old 0_0)

svetlana [45]3 years ago
4 0

Answer:

x=21

Step-by-step explanation:

x-4+100+3x=180

(180 are the degrees of a triangle added together)

subtract 100 on both sides

x-4+3x=80

simplify like terms

4x-4=80

add 4 to both sides

4x=84

divide 4

x=21

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Marizza181 [45]

Answer:

  • y = -5/2x + 5
  • y = 2x -1
  • y = 24/11
  • y = 4x + 4

Step-by-step explanation:

To solve for y, subtract the x-term and divide by the coefficient of y.

5x +2y = 10

  2y = -5x +10

  y = -5/2x + 5

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2y -4x = -2

  2y = 4x -2

  y = 2x -1

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7y +4y = 24

  y = 24/11

We assume there is a typo, but cannot tell what it is. Use the same method as described and demonstrated for the other problems.

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-2x +1/2y = 2

  1/2y = 2x +2

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3 years ago
1.) what is five forths of a right angle, 2.) what is three forths of a right angle?
klasskru [66]

Answer:

1.) 112.5 degrees

2.) 67.5 degrees

3.) 150 degrees

4.) 240 degrees

5.) 540 degrees

( don't hate me if any is wrong don't think they are but just trying to help) let me know if any of them are wrong and if it helped!

3 0
3 years ago
Read 2 more answers
I NEED THIS PLEASE these are all my points!
sertanlavr [38]

Answer:

m>14    or    m< -2

Step-by-step explanation:

7 0
3 years ago
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There are​ 15,958,866 adults in a region. If a polling organization randomly selects 1235 adults without​ replacement, are the s
VARVARA [1.3K]

Answer:

The selections are dependent.

Yes, they can be treated as independent (less than 5% of the population).

Step-by-step explanation:

Since the selections are made without replacement, each selection affects the outcome of the next selection and, therefore, the selections are dependent.

Although they are dependent, the selections can be treated as independent if the sample size is no more than 5% of the total population. In this case, the sample size is 1235 adults out of a population of 15,958,866 adults. The percentage represented by the sample is:

P=\frac{12,345}{15,958.866}*100\\ P=0.077\%

Thus the selections can be treated as independent for the purposes of calculations.

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3 years ago
Help me with fractions. Please look at the picture before solving. Circle 1/5 of all the triangles. Mark X's on 2/3 of the trian
Irina-Kira [14]
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