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Alekssandra [29.7K]
2 years ago
10

Results for a 20-point multiple choice math quiz are as follows: 9 students scored a 20,4 students

Mathematics
1 answer:
Ray Of Light [21]2 years ago
3 0

Answer:

18 1/2 or 37/2

Step-by-step explanation:

To calculate the average of something, we add the numbers and divide by the count of those numbers. In this case, we have this as the sum of the numbers:

9 × 20 + 4 × 19 + 3 × 18 + 5 × 17 + 12

And the number of students as the count:

9 + 4 + 3 + 5 + 1

Now to calculate that out:

(9 × 20 + 4 × 19 + 3 × 18 + 5 × 17 + 12)/(9 + 4 + 3 + 5 + 1) ⇒

(180+76+54+85+12)/(9+4+3+5+1) ⇒

407/22 ⇒

37/2⇒

18 1/2

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1
Marianna [84]

Answer:

  B. {16, 19, 20}

Step-by-step explanation:

The <em>triangle inequality</em> requires for any sides a, b, c you must have ...

  a + b > c

  b + c > a

  c + a > b

The net result of those requirements are ...

  • the sum of the two shortest sides must be greater than the longest side
  • the length of the third side lies between the difference and sum of the other two sides

__

If we look at the offered side length choices, we see ...

  A: 8+11 = 19 . . . not > 19; not a triangle

  B: 16+19 = 35 > 20; could be a triangle

  C: 3+4 = 7 . . . not > 8; not a triangle

  D: 5+5 = 10 . . . not > 11; not a triangle

The side lengths {16, 19, 20} could represent the sides of a triangle.

_____

<em>Additional comment</em>

The version of triangle inequality shown above ensures that a triangle will have non-zero area.

The alternative version of the triangle inequality uses ≥ instead of >. Triangles where a+b=c will look like a line segment--they will have zero area. Many authors disallow this case. (If it were allowed, then {8, 11, 19} would also be a "triangle.")

4 0
2 years ago
Which of the following is a factor of x4−8x2+16?
ad-work [718]
16 is correct I hope this helps :)))))))))))))
6 0
3 years ago
The scale reads 18kg a dog weighed at an animal clinic. About how many pounds dose the dog weigh​
zhenek [66]

Answer:

Step-by-step explanation:

80 pds

5 0
3 years ago
Read 2 more answers
Pls help me with this math!
Neko [114]

Answer:

x = 50.60 cm

Step-by-step explanation:

Given triangles ΔMAB and ΔMNP are smilar accordingly their corresponding sides are proportional.

But first we will determine the size of the side MA:

MA = MN - AN = 46.2 - 14 = 32.2 cm

Now we will make proportion:

MN : MA = MP : MB  =>  46.2 : 32.2 = 72.6 : x

When we multiply external and internal members we get:

46.2 x = 72.6 · 32.2 => x = 72.6 · 32.2 / 46.2 = 2337.72 / 46.2 = 50.60 cm

x = 50.60 cm

God with you!!!

5 0
3 years ago
List out the elements of the set “The letters of the word Mississippi”
navik [9.2K]

Answer:

{M, i, s, p}

Step-by-step explanation:

The elements of the set are the letters in Mississippi. But remember, elements cannot repeat themselves! So the elements of this set would be {M, i, s, p} since all the other letters are just repetitions.

Hope this helps!!

4 0
3 years ago
Read 2 more answers
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