5.18. There are two types of batteries in a bin. When in use, type batteries last (in hours) an exponentially distributed time with rate A battery that is randomly chosen from the bin will be a type battery with probability If a randomly chosen battery is still operating after hours of use, what is the probability that it will still be operating after an additional hours

arrange the equations with like terms in columns.

analyze the coefficients of x or y.

add the equations and solve for the remaining variable.

substitute the value into either equation and solve.

check the solution.

step-by-step explanation:

$113.42

i hope that is right.

step-by-step explanation:

4.5(4 − x ) + 36 = 202 − 2.5(3x + 28) now multiply from the paranthesis

18 -4.5x + 36 = 202 -7.5x + 70 will add the numbers

54-4.5x = 272-7.5x move x to the left and numbers to the right

7.5x-4.5x = 272-54 make the difference

3x = 218 and divide by 3

x= 72