4. If x 1-y 40 the relation between x and y is A. xy + y+ 8 =0 B. x-xy-8 0 C. xy-y+ 8=0 D. xy- x +8=0 5. The Cartesian equation of a curve defined parametrically by x= and y : is: 1+t 1+t A. x+ y 1 B. x-y 1 C. 2x +y 1 D. x-2y 1 6. The Cartesian equation of a curve defined parametrically by x = 1+ sec 8, y = -1+ tan 8 is A. (x- 1)2 = (y+ 1) + 1 B.(x+1)2 (y- 1)2 + 1 C. (x- 1)2 (y + 1)2- 1 D. (x- 1)2 = (y + 1)?

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A: given that x+42-y=53 solve for y

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A: It is related to binomial probability : P(X=x) = nCx*px*qx    p= 12/52 = 0.23 q= 1-(12/52) = 0.77

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Equations and Inequations

Equations and inequalities describe the relationship between two mathematical expressions.

Linear Functions

A linear function can just be a constant, or it can be the constant multiplied with the variable like x or y. If the variables are of the form, x2, x1/2 or y2 it is not linear. The exponent over the variables should always be 1.