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Simplify the rational expression. ∙

Find a natural number that can replace b and make the expression factorable.7×2 + bx + 3 There is more than one answer.  Just give one. b = [answer]

Calculate the enthalpy change for the reaction P4O6(s) + 2O2(g) → P4O10(s)given the following enthalpies of reactionP4(s) + 3O2(g) → P4O6(s) , △H = -1640.1 kJP4(s) + 5O2(g) → P4O10(s) , △H = -2940.1 kJ

If.the standard enthalpy of formation of H2O(l) is -286 kJ/mol, which one of the following equations represents the formation reaction of H2O?  

Select the net ionic equation for the reaction between lithium hydroxide and hydrobromic acid.LiOH(aq) + HBr(aq) → H2O(l) + LiBr(aq)

Which one of the following improper integrals are convergent? I.

A race car begins the race with an acceleration of [a] m/s2 for [t] s.  What speed does the car reach at the end of this time interval, in meters/second?

A rock is dropped off of a tall bridge.  The rock takes 4.05 s to reach the water below.  What is the height of the bridge (ignore air resistance)?

Both scalar and vector quantities have magnitude, but only scalar quantities have direction.

A river flows north to south with a speed of [v1] m/s.  If a kayak is propelled due east across this river at a speed of [v2] m/s, and the river is [d] m wide, how far downstream will the kayaker land with respect to their original position on the west bank of the river, in meters?