Marcus says that 8.7-12.4 is equal to 16.3 explain why this is not correct

Somone me i want to know what 18 hours out of 24 hours in a fraction

Anew shopping mall is gaining in popularity. every day since it opened, the number of shoppers is 5% more than the number of shoppers the day before. the total number of shoppers over the first 10 days is 1258 how many shoppers were on the first day?

1) what is the measure of the exterior angle, ∠uvw ? 2) in triangle man, what is the measure of the exterior angle at n (in degrees)?