Which expression is equivalent to 2^n-1

Which function families have maximums and minimums? 1.)linear absolute value functions and exponential functions 2.) linear absolute value functions and quadratic functions 3.) linear absolute value functions and linear functions 4.) linear absolute value functions and constant functions

Every time you drive you will experience a combination of driving conditions and environments.

Jenisey has $24 to spend on seven pencils. after buying them she had $10. how much did each pencil cost.?