Anew light bulb has a probability of 3 of remain working after 1500 4 hours, and a probability of 1 of remain working after 2000 hours. a 2 particular light bulb has been used for 1500 hours and is still working. what is the probability that this light bulb can be used for another 500 hours at least?

Iam trying to solve a linear equation for the shoe size of someone 84" tall taking into consideration example 1 is 69" tall with a shoe size of 9 and example 2 is 72 inches tall with a shoe size of 11. i understand that the equation should be y=mx+b and that on the graph the answer is (3,2) but i just don't understand how to create the equation to solve for 84-inches and 60-inches tall questions. after two days, i need .

If the cost to mail a package is an initial $5 and $0.28 for every pound the total cost to mail a package was $11.27, how much did the package weigh?

X+ y = 5 ; x - y =3 solve using linear combination