Some red and some black pens area sold in packages of 20. The red pens are worth 50 cents each and the black pens are worth 30 cents each. The package of twenty pens is worth $8.20. How many black
pens are in the package?

C. i believe it is (5×(-20))+(100×(0.7))

2.4+3.2t. you get the answer by adding the ones with variables and ones without

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.