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3 years ago

How do you find the median of 15,8,19,21,18,17 ? Thanks

Mathematics

2 answers:

KengaRu [80]3 years ago

7 0

Answer:

median = 17.5

Step-by-step explanation:

The median is the middle value of a data set arranged in ascending order. If there is not a middle value then the median is the average value of the numbers either side of the middle.

Data in ascending order is

8, 15, 17, 18, 19, 21

The median is between 17 and 18, hence

median = $\frac{17+18}{2}$ = 17.5

Feliz [49]3 years ago

6 0

Answer:

Step-by-step explanation:

The median is the value that separates the higher half from the bottom half of the data sample (middle value).

We have

15, 8, 19, 21, 18, 17

Write from the smallest to the largest number

8, 15, 17, 18, 19, 21

We have an even number of numbers. Therefore we calculate the arithmetic mean of the two middle numbers:

8, 15, 17, 18, 19, 21

(17 + 18) : 2 = 35 : 2 = 17.5

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What’s the least common multiple of x^2-2x-15 and x^2+2x-3?

Ghella [55]

Answer:

$\large\boxed{LCM(x^2-2x-15,\ x^2+2x-3)=(x+3)(x-5)(x-1)}\\\boxed{=x^3-3x^2-13x+15}$

Step-by-step explanation:

$x^2-2x-15=x^2+3x-5x-15=x(x+3)-5(x+3)=(x+3)(x-5)\\\\\\x^2+2x-3=x^2+3x-1x-3=x(x+3)-1(x+3)=(x+3)(x-1)\\\\LCM(x^2-2x-15,\ x^2+2x-3)=(x+3)(x-5)(x-1)\\\\=(x^2-2x-15)(x-1)\qquad\text{use FOIL}\\\\=(x^2)(x)+(x^2)(-1)+(-2x)(x)+(-2x)(-1)+(-15)(x)+(-15)(-1)\\\\=x^3-x^2-2x^2+2x-15x+15\qquad\text{combine like terms}\\\\=x^3+(-x^2-2x^2)+(2x-15x)+15\\\\=x^3-3x^2-13x+15$

4 0

3 years ago

Set E = { three-digit numbers divisible by 8 }<br> Find n(E) = ? ( don't mind the nos. 3 )

Julli [10]

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3 years ago

Read 2 more answers

For each 11 mm of coloured fabric Nick uses to make his curtains, he also uses 2 cm of white fabric. Express the amount of white

defon

Answer:

The amount of white fabric to coloured fabric as a ratio is 20:11

Step-by-step explanation:

We are given that For each 11 mm of colored fabric Nick uses to make his curtains, he also uses 2 cm of white fabric.

Length of colored fabric = 11 mm

Length of White fabric = 2 cm

1 cm = 10 mm

2 cm = 20 mm

So, length of white fabric = 20 mm

So, Ratio of the amount of white fabric to coloured fabric = $\frac{20}{11}$

Hence the amount of white fabric to coloured fabric as a ratio is 20:11

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3 years ago

Please help thx 10 poin

Annette [7]

Answer:

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Step-by-step explanation:

If the angel is 90:

75 + 90 = 165

165 divided by 3 = 55

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2 years ago

How do I graph g(x)=f(x)+5

sashaice [31]

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(5,0)(5,0)

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2 years ago