In 2 hrs, whitney can make 4 dozen cookies or 2 peach tarts. her friend, amy, can make 7 dozen cookies or 1 peach tart.
if whitney, specializes in cookies and amy specializes in peach tarts, total production of cookies will be __ dozen cookies , and total production of peach tarts will be __ peach tart.

4 dozen cookies and 1 peach tart

Explanation:

Whitney can make:

4 dozen cookies or 2 peach tarts in 2 hours

Amy can make:

7 dozen cookies or 1 peach tart in 2 hours

Here, we assume that there is only 2 hours of production

Cookies:

If Whitney specialize in cookies and there is no production of tart but only the production of cookies by Whitney, then,

Total production of cookies = 4 dozen cookies

Tart:

If Amy specialize in peach tart and there is no production of cookies but only the production of peach tart by Amy, then,

Total production of peach tart =  1 peach tart

yup the answer is

answer; ///liability;