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Write the system of linear equations represented by the following augmented matrix.  

How many rows are in a truth table for the proposition (p ∧ ¬r) ∨ (q ∧ ¬p) ∨ (r ∧ p) ?

Give the number of valence electrons for SO3.

Given the balanced equation 4NH3 (g) + 5O2 (g) → 4NO (g) + 6H2O (g), if 82.0 g of NH 3 react, how many grams of NO should form?

To perform a certain task, suppose that algorithm A requires  operations to compute. What is the 

Given definition: R is a relation on a set A. The relation R is transitive if for every x,y,z in A, xRy and yRz imply xRz. True or False. Let R be a relation defined on set S where S = {1, 2, 3} and R = {(1,1), (1,2), (2, 1)}. R is transitive.  

An energy input of 227 kJ is required to form acetylene from its elements. Convert this energy to units of calories.

Find the equation of the line that passes through the given points (4, 3) and (-4, -4).  Write the equation in slope intercept form.  

The number of valence electrons for calcium are:

Which element has the abbreviated electron configuration [Ne]3 s23p2?