Caden buys 3.9 pounds of grapes that cost $1.80 per pound. Which expression

can be used to find the total cost of the grapes?

(3+0.9) X1 + (3+0.9) <0.80

(3 + 0.9) x 1 + (3 + 0.9) x 8

(3 % 0.9) 1 + (3 x 0.9) <0.80

(3 x 0.9) x1 + (3 x 0.9) x 8

Answer: (3 + 0.9) * 1 + (3 + 0.9) * 0.80

Step-by-step explanation:

We know that each pound cost $1.80 and he buys 3.9 pound.

Then the total cost is:

Cost = $1.80*3.9

And we can write this as:

cost = (1 + 0.80) * (3 + 0.9) = (3 + 0.9) * 1 + (3 + 0.9) * 0.80