3. 5 bananas cost $2. At this rate, how much do 4 bananas cost?

$1.60

Step-by-step explanation:

Write out a proportion.

5 bananas/$2 = 4 bananas/$x

Simplify the proportion, by cross multiplying.

2 times 4 equals 8, then divide 8 by 5, which will give you our variable x.

8/5 is the same as 1.60, so the cost of 4 bananas will cost $1.60.

Hope this helped,

Philip

Brainliest always appreciated! <3