Can someone explain using a relevant theorem that if we have a matrix whose columns form an orthonormal set then we know that the rows must also form an orthonormal set.

Click on the graphic until you find the right quotient. (36xa - 30xb) ÷ (-6x2)

Afarmer sells 9.5 kilograms of apples and pears at the farmer's market. 4/5 of the weight is the apples and the rest is the pears. how many kilograms of pears did she sell at the farmers market

Big boi and travis scott are performing at the super bowl. travis scott is 62 years younger than twice big boi’s age. the sum of their ages is 70 years old. use b to represent big boi’s age. write and solve an equation.