Combine like terms to simplify the expression: Enter any coefficients as simplified proper or improper fractions or integers. 2/5k - 3/5 + 1/10k

The graph shows a trend in an ecosystem over time caused by increased pollution in the region. what can you conclude from the graph? a. there’s lower biodiversity among birds. b. there’s a higher reproductive rate among birds. c. there’s a significant decline in the number of producers. d. other types of animals were unaffected by pollution.

After studying french for 5 yearscin school, i was shocked to discover when i went to france that i couldn't even get a glass of water without a lot of sign language what is the author main point

Case # 51173878 weighs 814 pounds; case # 51173981 weighs 803 pounds; case # 51174058 weighs 817 pounds; case 51174178 weighs 815 pounds; case # 51174248 weighs 817 pounds; case # 51174495 weighs 781 pounds; case # 51174577 weighs 828 pounds. what are the case #'s of the two cases that weigh the same amount?