Which term describes lines that intersect at a 90° angle?
a. perpendicular
b. vertical
c. complementary
d. parallel

Describe the possible echelon forms of the standard matrix for a linear transformation t where t: set of real numbers is onto.

Normal yağmur ile asit yağmuru arasındaki fark nedir

12. the amount of money in a bank account decreased by 21.5% over the last year. if the amount of money at the beginning of the year is represented by ‘n', write 3 equivalent expressions to represent the amount of money in the bank account after the decrease?