Problem-2 I roll a fair die twice and obtain two numbers: X1 = result of the first roll, X2 = result of the second roll. a. Find the probability that X2 = 4. b. Find the probability that X1 + X2 = 7. c. Find the probability that X1 2 and X2 > 4.

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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.