Simplify the algebraic expression that arises when substituting x = 3 into the distributive expression 4(x + 2): what numeric value results after distributing and combining?

A pipe delivers water at a rate of 3 liters per minute. How many cubic meters are delivered in 2 hours?

Given the simple linear formula y = mx + b, solve symbolically for x in terms of y, m, and b (assume m ≠ 0).

Given the formula for compound interest A = P(1 + r/n)^nt, isolate r symbolically (write r in terms of A, P, n, and t).

A toy car has a mass (m) of 2 kg and a kinetic energy (K) of 18 J. Using the kinetic energy formula K = 1/2 mv², find v, and round your answer to 1 decimal place. Note: v > 0.