Respuesta :

Answer:

140

Step-by-step explanation: 20X7=140

wegnerkolmp2741o

Answer:

$140

Step-by-step explanation:

We can use a ratio to solve

2 objects         7 objects

---------------- = --------------

$40                  x dollars

Using cross products

2 *x = 40 *7

2x = 280

Divide each side by 2

2x/2 =280/2

x = 140

7 objects cost 140 dollars