WILL GIVE 100 POINTS AFTER YOU ANSWER What is the mean of this data set: 17, 13, 18, 20, 17, 15, 12

16
20
17
19

Mean of a data = Sum of all observations ÷ Total number of observations

Mean of this data will be :

Sum of all observarions = 17 + 13 + 18 + 20 + 17 + 15 + 12 = 112

Total number of observations = 7

Mean = 112 ÷ 7

Mean = 16

Therefore the mean of this data set = 16

answer: bearing in mind that a rectangle has a perimeter of length + length + width + width.

step-by-step explanation:

p = perimeter

l = length

x=width

p = 2l + 2x

p = 2(l+x)     < ==== perimeter of the base of the box.

answer is 8x+24

area of vanessa's patio = length × width

given, length = (3x² + 5x + 10)

width = (x² - 3x - 1)

area of vanessa's patio = (3x² + 5x + 10)(x² - 3x - 1)

= 3x²(x² - 3x - 1) + 5x(x² - 3x - 1) + 10(x² - 3x - 1)

= 3x⁴ - 9x³ - 3x² + 5x³ - 15x² - 5x + 10x² - 30x - 10

= 3x⁴ - 4x³ - 8x² - 35x - 10

hence, expression of vanessa's patio = (3x⁴ - 4x³ - 8x² - 35x - 10)