anabelleacunamu
25.04.2022 •
Mathematics
In a random sample of n = 300 adults, 162 individuals say that they believe in love at first sight.
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Ответ:
-8x + 8x + 3y = 21 + 8x
3y = 21 + 8x
3 3
y = 7 + 2 2/3x
-8x + 3(7 + 2 2/3x) = 21
-8x + 21 + 8x = 21
-8x + 8x + 21 = 21
0x + 21 = 21
0x + 21 - 21 = 21 - 21
0x = 0
0 0
x = 0
-8(0) + 3y = 21
0 + 3y = 21
3y = 21
3 3
y = 7
(x, y) = (0. 7)
-8x + 3y = 21
-8x + 3y - 3y = 21 - 3y
-8x = 21 - 3y
-8 -8
x = -2 5/8 + 3/8y
-8(-2 5/8 + 3/8y) + 3y = 21
21 - 3y + 3y = 21
21 - 0y = 21
21 - 21 - 0y = 21 - 21
-0y = 0
-0 -0
y = 0
-8x + 3(0) = 21
-8x + 0 = 21
-8x = 21
-8 -8
x = -2 5/8
(x, y) = (-2 5/8, 0)