Solve the following problem by using cross-multiplication. Janae enlarges a photo measuring 5 inches by 2 inches so that its length is 7.5 inches. What is the new width of the photo?
A. 0.67 inches
B. 1.33 inches
C. 3 inches
D. 1.5 inches
Let the new width of the photo be x inches.
By cross-multiplication:
5 inches / 2 inches = 7.5 inches / x inches
5x = 15
x = 15 / 5 = 3 inches
Therefore, the new width of the photo is 3 inches.
The answer is C. 3 inches.