Answer:
The factory can make 3 witch costume from 18 buttons
The factory can make 7 witch costume from 42 buttons
The factory can make 11 witch costume from 66 buttons
The factory can make 14 witch costume from 84 buttons
Step-by-step explanation:
Let us use the ratio method to complete the table
∵ A factory needs 6 buttons to make 1 witch costume
∵ There are 18 buttons
→ Find how many witch costume can make from them
→ Buttons → costume
→ 6 → 1
→ 18 → x
→ By using cross multiplication
∵ x × 6 = 18 × 1
∴ 6x = 18
→ Divide both sides by 6
∴ x = 3
∴ The factory can make 3 witch costume from 18 buttons
Use the same way to find the rest
∵ There are 42 buttons
→ Buttons → costume
→ 6 → 1
→ 42 → x
→ By using cross multiplication
∵ x × 6 = 42 × 1
∴ 6x = 42
→ Divide both sides by 6
∴ x = 7
∴ The factory can make 7 witch costume from 42 buttons
∵ There are 66 buttons
→ Buttons → costume
→ 6 → 1
→ 66 → x
→ By using cross multiplication
∵ x × 6 = 66 × 1
∴ 6x = 66
→ Divide both sides by 6
∴ x = 11
∴ The factory can make 11 witch costume from 66 buttons
∵ There are 84 buttons
→ Buttons → costume
→ 6 → 1
→ 84 → x
→ By using cross multiplication
∵ x × 6 = 84 × 1
∴ 6x = 84
→ Divide both sides by 6
∴ x = 14
∴ The factory can make 14 witch costume from 84 buttons
