2+2 pls help me and my friend hade baen tying far eber

Create and solve a linear equation that represents the model, where squares and triangles are shown evenly balanced on a balance beam. assume the weight of a square is 1 unit and the weight of a triangle is unknown.

You paint a 1/2 of a wall in 1/4 hour. how long will it take you to paint one wall

Pls if a cow has a mass of 9×10^2 kilograms, and a blue whale has a mass of 1.8×10^5 kilograms, which of these statements is true?