Pre-algebra (foundation)

The scale shows the weight of the items in kilograms (kg).

What's the weight of one square?

• 4 kg

• 8kg

• 10 kg

• 20kg

The scale shows the weight of the items in kilograms (kg).

What's the weight of one triangle?

• 10 kg

• 15 kg

• 20 kg

• 25 kg

The scale shows the weight of the items in kilograms (kg).

What should the bottom scale read?

Use the variable c to represent the weight of a circle on this scale.

What's the total weight on the scale?

• c + c + c + c

• 4c

• 4 × c

• All of the choices are correct.

The variable c represents the weight of one circle.

Write an expression with c in it that describes 4 circles plus 15 kg.

The scale will update as you enter your answer, in terms of c.

(unit in kg not required)

The variable c represents the weight of one circle.

The total weight on the scale is 4c+15.

Suppose the total weight on the scale is 55 kg.

Calculate the weight of each circle.

(type your answer - number only)