Question

Two variables x and y, assume the values x1= 2, x2 = - 8, x3= 4 x4=1 and y1 =-3 y2 =-8 y3 =10 y4=6 Calculate x

Answer 1

Answer:

Two variables, X and Y assume the values X1=2, X2=-5, X3=4, X4=-8 and Y1=-3, Y2=-8, Y3=10, Y4=6, respectively. Calculate (a) ∑ X, (b) ∑ Y, (c) ∑ X2, (d) ∑ Y2, (e) ∑ XY (f) (∑ X)( ∑ Y), (g) ∑ XY2, and (h) ∑ (X+Y)(X-Y).

Step-by-step explanation:

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Answer 2

x1=20, x2=40, y1=10, y2=1

Explanation:

• Given x,y are inv. proportional $\implies xy = C$

• $8y_1 =16\times 5\implies y_1 = 10$
• $4x_1 =16\times 5\implies x_1 = 20$
• $2x_2 =16\times 5\implies x_2 = 40$
• $80y_2 =16\times 5\implies y_2= 1$