Which type of triangle will always have exactly 1 fold reflections symmetry

The sum of the reciprocal of a positive number and the reciprocal of 2 more than the number is 3/4 equation: the number is

On saturday a souvenir shop had 125 customers.sixty four percent of the costumers paid with a credit card. how many costumers paid with cash?

Aquadratic equation in standard from is written ax^2= bx+c, where a,b and c are real numbers and a is not zero?