De una botella de 4 l se utilizaron 2 4/5. ¿cuánto aceite queda?

How do i do this? i don’t understand

The length of a rectangle is x times the square root of 100. the width is one-half y more than three-halves x. given that the area of the rectangle is 125 cm2, which equation could represent the rectangle in terms of x and y? a) 5xy − 15x = 125 b) 5xy + 15x = 125 c) 15x2 − 5xy = 125 d) 15x2 + 5xy = 125

Polygon abcde is reflected to produce polygon a′b′c′d′e′. what is the equation for the line of reflection?