Evaluate 3 + (-1) + (-4) where h=-7

Aparallel system functions whenever at least one of its components works. consider a parallel system of n components, and suppose each component works independently with probability 0.5. find the conditional probability that component n works given that the system is working

What is the length of the segment joining the points at (4,5) and (6,-2) round to the nearest tenth if necessary

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angle measure.