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andre [41]
3 years ago
7

Find the mean median mode 12,9,12,11,10,18,7,19,13,19

Mathematics
1 answer:
Nady [450]3 years ago
8 0

Mean : The average of all the data in a set.

Median : The value in a set which is most close to the middle of a range.

Mode : The value which occures most frequently in a data set.

12,9,12,11,10,18,7,19,13,19

Mean = 13 (Average)

Median = 12 (Middle)

Mode = 12, 19 (most common)

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Find the points on the ellipse 4x2 + y2 = 4 that are farthest away from the point (−1, 0).
Hitman42 [59]
<span>The two points that are most distant from (-1,0) are exactly (1/3, 4sqrt(2)/3) and (1/3, -4sqrt(2)/3) approximately (0.3333333, 1.885618) and (0.3333333, -1.885618) Rewriting to express Y as a function of X, we get 4x^2 + y^2 = 4 y^2 = 4 - 4x^2 y = +/- sqrt(4 - 4x^2) So that indicates that the range of values for X is -1 to 1. Also the range of values for Y is from -2 to 2. Additionally, the ellipse is centered upon the origin and is symmetrical to both the X and Y axis. So let's just look at the positive Y values and upon finding the maximum distance, simply reflect that point across the X axis. So y = sqrt(4-4x^2) distance is sqrt((x + 1)^2 + sqrt(4-4x^2)^2) =sqrt(x^2 + 2x + 1 + 4 - 4x^2) =sqrt(-3x^2 + 2x + 5) And to simplify things, the maximum distance will also have the maximum squared distance, so square the equation, giving -3x^2 + 2x + 5 Now the maximum will happen where the first derivative is equal to 0, so calculate the first derivative. d = -3x^2 + 2x + 5 d' = -6x + 2 And set d' to 0 and solve for x, so 0 = -6x + 2 -2 = -6x 1/3 = x So the furthest point will be where X = 1/3. Calculate those points using (1) above. y = +/- sqrt(4 - 4x^2) y = +/- sqrt(4 - 4(1/3)^2) y = +/- sqrt(4 - 4(1/9)) y = +/- sqrt(4 - 4/9) y = +/- sqrt(3 5/9) y = +/- sqrt(32)/sqrt(9) y = +/- 4sqrt(2)/3 y is approximately +/- 1.885618</span>
7 0
3 years ago
Sunshine the cow eats 3/5 of a bale of hay a day.How many bales of hay will she eat in a week?
Lorico [155]
7 day in a week so 3/5×7= 4.2

or 4 1/5 bales of hay
7 0
3 years ago
Read 2 more answers
Someone help, lol I've been tryna do the last too for so long, I think I am just tired...
kozerog [31]

Answer:

see explanation

Step-by-step explanation:

(a)

4 × 4 = 4²

(b)

5 × 5 × 5 × 5 = 5^{4}

(c)

3 × 7 × 7 × 7 × 7 = 3 × 7^{4}

(d)

2 × 9 × 9 × 9 × 2 × 9 ← rearrange

= 2 × 2 × 9 × 9 × 9 × 9

= 2² × 9^{4}

6 0
3 years ago
Determine if the graph is symmetric about the x-axis, the y-axis, or the origin. r = 2 cos 3θ​
Nina [5.8K]
Take a quick peek at brainly.com/question/10417591
that's how you test for the y-axis, x-axis and origin

recall your symmetry identities, cos(- θ) = cos(θ)

so, simply replace θ for those values, and if the resultant function looks exactly like the original, then it has that symmetry.
5 0
3 years ago
Five less than a number tripled
Elenna [48]

Answer:

3(n-5)

Step-by-step explanation:

Less than indicates subtract and since 5 is less than a number <em>N</em> goes first.

Tripled goes on the outside because the number that is 5 less gets tripled

Hope this helps

3 0
2 years ago
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