Respuesta :
it is $63 for one ton of concrete, so 3 tons of concrete will be $189
Answer:
$189
Step-by-step explanation:
first divide 42 by 2 which =21. This will give you the price for 1/3 of a ton of concrete. Then you multiply 21 by 3, so you know the price of 1 whole ton of concrete which is 63. Now that you know the price of one ton of concrete, you can multiply that by 3, to know the price of 3 tons of concrete.