Answer:
5.425
Explanation:
Given the statement: One pound of grapes costs $1.55.
Let x be be the cost of 3.5 pounds of grapes.
Equivalent ratios states that the two ratios that express the same relationship between numbers.
Therefore, by equivalent ratio:
\frac{1 pound}{cost of 1 grapes} =\frac{3.5 pound}{cost of 3.5 grapes}costof1grapes1pound=costof3.5grapes3.5pound
then, we have;
\frac{1}{1.55}=\frac{3.5}{x}1.551=x3.5
Cross multiply the above equation; we hve
x = 1.55 \times 3.5x=1.55×3.5
x = 5.425
therefore, the cost of 3.5 pounds of grapes is, $5.425
