If 80% percent is 60 marks what is full marks

Given that de, df, and ef are midsegments of △abc, and de=3.2 feet, ef=4 feet, and df=2.4 feet, the perimeter of △abc is .

Add the two expressions 3.8b - 7 and 2.9b + 9 enter your answer in simplified form

How do businesses a country's economy? a. by investing in goods and services b. by increasing the unemployment rate c. by making profits