Timothy bought concrete mix for several projects. he used 3.5 bags of concrete mix for a new set of stairs and 2.25 bags of concrete mix for a garden wall. timothy mixed 345 pounds of concrete in all. a. model with math write an equation that can be represented by the bar diagram. b. solve for y. how many pounds of concrete does each bag make?

The required model is

60 pounds of concrete each bag make.

Step-by-step explanation:

Consider the provided information.

Let the number of concrete bags are used is represented by y.

Part (A)

3.5 bags of concrete mix for a new set of stairs and 2.25 bags  of concrete mix for a garden wall.

This can be written as:

Timothy mixed  345 pounds of concrete in all.

Therefore,

Hence, the required model is

Part (B)  Solve for y. How many pounds of concrete does each bag make?

Consider the above equation.

Solve the equation for y as shown.

Add the like terms.

Divide both the sides by 5.75

Hence, 60 pounds of concrete each bag make.