Melinda and paula shovel driveways and sidewalks in the winter as a way to earn extra money. together they shoveled 450 square feet of sidewalk in 30 minutes. then melinda shoveled for 20 minutes while paula shoveled for 25 minutes to complete 345 square feet of driveway.

30x + 30y = 450

20x + 25y = 345

how much more can paula shovel in 1 minute than melinda?

3 square feet per minute

6 square feet per minute

9 square feet per minute

15 square feet per minute

3 square feet per minute

The academic affairs council is the highest expert body processing academic affairs, as stipulated by the university statutes. specialist aaro häkkinen (educational policy) took part in the council’s meeting. the agenda of the meeting included bachelors’ feedback, the timing of pedagogical studies, the grant system for tuition fees, the standardisation of administrative practices for internships and the situation of foreign-language and multilingual master’s programmes.