You can get 640 calories from eating 8 apples. how many calories can you get from eating 1 apple?

1. what is the measure of ∠abc? what is the measure of ∠abd?

[10 points, algebra 2-simplifying complex fractions]according to my answer key the restrictions are -1 and 4. but why not positive 1?

In the next 10 month,colin wants to save $900 for his vacation.he plans to save $75 each of the first 8 months. how much must he save each of the last 2 months in order to meet his goal if he saves the same amount each month ?