John can paint his home exterior in 16 hours alone. if john starts painting 2 hours before pattie joins him, they can finish the job in 8 mroe hours. how long would it take pattie if she painted the home exterior alone?

a) 18 hours
b) 20 hours
c)21 1/3 hours
d)20.5 hours
e) none of the above

explain your answer. it would be much appreciated.

Can some one explain how to slove specifically, what is the value of x? 0.9(x+1.4)-2.3+0.1x=1.6 enter the answer as a decimal in the box. x= ?

Find two numbers if their sum is 91 and the ratio is 6: 7?

Carla was trying to decide what to do saturday evening. she has $100 available to spend for the evening. she has narrowed her choices down to these events: braves game, a concert of an artist she likes, or the georgia aquarium. admission to the braves game is $25, hot dogs cost $10, sodas cost $5. the concert costs $25 for admission, $20 for a souvernir t-shirt, and $10 for a soda. the georgia aquarium has the show of a lifetime with an all you can eat and drink that costs $100. carla does not want to take any driving chances, so in addition to the cost of the aquarium, she will also need to pay for her uber/lyft, which is $15 each way. which option should carla choose if she wants to spend the least? based on that choice, what then is carla's oppotunity cost? fully explain your answer in at least one paragraph.