Question

Timothy bought concrete mix for several projects. He used

Answer 1

Answer:

The required model is $3.5y+2.25y=345$

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:

$3.5y+2.25y$

Timothy mixed  345 pounds of concrete in all.

Therefore, $3.5y+2.25y=345$

Hence, the required model is $3.5y+2.25y=345$

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

Consider the above equation.

$3.5y+2.25y=345$

Solve the equation for y as shown.

Add the like terms.

$5.75y=345$

Divide both the sides by 5.75

$y=60$

Hence, 60 pounds of concrete each bag make.

Answer 2

3.5y+2.25y=345

5.75y=345

60

Each bag makes 60 lbs of concrete