What is the primary source of energy in an ecosystem?

I. y² + y – 56 = 0

II. 2x² + 11 x – 40 = 0

Quantity I: The cash price of a notebook is Rs. 100 but is can also be purchased on 11 monthly equal instalments of Rs. 10 each. Find rate of S.I.?

I:  x² - 33x + 242 = 0

II:  y² - 4y - 77 = 0

Solve the quadratic equations and determine the relation between x and y:

Equation 1: 19x² - 88x + 100 = 0

I. 27x² + 120x + 77 = 0

II. 56y² + 117y + 36 = 0

Solve the quadratic equations and determine the relation between x and y:

Equation 1: 13x² - 60x + 47 = 0

Equation 2: 17y² - 80y + 63 = 0

I. 4x² -  15x + 9 = 0

II. 20y² -  23y + 6 = 0

I. x² – 36 = 0

II. y² - 7y + 6 = 0

I. x² – 13x + 40 = 0

II. 2y² – 15y + 13 = 0 

I. 66x² - 49x + 9 = 0

II. 46y² - 37y - 30 = 0