in a class of 80 students every student studied economic or geography or both If 65students study economic and 50students study geography how many students study both subjects​

The sum of the first eight terms of an arithmetic progression is 9m + 14. the fifth term of the06 progression is 2m - 6, where m is a constant. given that the first term of the progression is 26,find the value of the common difference, d and thevalue of m.

The police chief wants to know if the city’s african americans feel that the police are doing a good job. identify the management problem (i. e dependent variable) and identify the independent variable.

Astudent was asked to find the square of 7x+3. the student quickly wrote (7x+3)^3= 49x^2+9. identify the student's error and provide the correct answer.