So pls me on this one:

leanne has 15 small pieces of dough that are each to make 15 biscuits she already cut some 1/2 ounce pieces from a 6-ounce ball of dough how many more 1/2 ounce pieces dose she still needs to make 15 biscuits? pls, show work!

The long jump record, in feet, at a particular school can be modeled by f(x) = 19.6 + 2.5ln(x + 1) where x is the number of years since records began to be kept at the school. what is the record for the long jump 11 years after record started being kept? round your answer to the nearest tenth.

Ametalworker has a metal alloy that is 30? % copper and another alloy that is 55? % copper. how many kilograms of each alloy should the metalworker combine to create 90 kg of a 50? % copper? alloy?

What is the simplified expression for 6(2(y+x))