Question

1. Euros are currency used in several European countries. On one day in October 2005, you could exchange $3 for about 2.5 euros. How many dollars would you have needed to get 8 Euros?

2. Hooke’s law states that the distance a spring is stretched is directly proportional to the force applied. If 20 pounds of force stretches a spring 4 inches, how much will the spring stretch if 80 pounds of force is applied?

3. A 3-ounce serving of tuna fish provides 24 grams of protein. How many grams of protein are in a 10-ounce serving of tuna fish?

Answer 1

\(\dfrac{$3}{2.5Euro}=\dfrac{$x}{8euro}\)

Answer 2

\(\dfrac{20lb}{4in}=\dfrac{80lb}{xin}\)

\(\dfrac{3oz}{24g}=\dfrac{10oz}{xg}\)

do you need help solving these?

Answer 3

no, thank you

Answer 4

alrighty, feel free to post answers if you want them confirmed

Answer 5

ok

Answer 6

yA i need help after all ;///

Answer 7

:\\\\

Answer 8

:V
:|

Answer 9

although technically, "cross multiplying" isn't a valid operation, it's the commonly used method to teach people how to solve proportions.