Answer:
To find the price of 3 tons of concrete, we need to first figure out how much Trey paid per ton of concrete.
Since Trey paid 42 dollars for 2/3 ton of concrete, we can set up a proportion:
2/3 ton = 42 dollars
1 ton = x dollars
To solve for x, we can cross-multiply:
(2/3) * x = 42 * 1
2x = 126
x = 63
So, Trey paid 63 dollars per ton of concrete.
To find the price of 3 tons of concrete, we can multiply the cost per ton by the number of tons:
3 tons * $63/ton = $189
Therefore, the price of 3 tons of concrete is $189.