exam Maths Puzzle Numerical Ability

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raising rabbits. Before Roland sold two female rabbits half of his rabbits were female. If x represents his orginal number of rabbits, then
1/2x -2= 1/3(x-2).

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exam Other Question

solve each system by the substition method. Indicate whether each system is independent, inconsistent or dependent.
problem # 14
x= 1/8y - 1
y= 1/4x + 39

problem #20
x + 3(x In each of the following settings, give a 95% confidence interval for the coefficients of x1 and x2.
(a) n = 22, y hat = 11.1 + 105x1 + 15.1x2, SEb1 = 7.4 and SEb2 = 4.9.
95% CI