Unit Rate Comparison Practice POSSIBLE POINTS 2
A cookie recipe called for 3?, cups of sugar for every 246 cups of
flour. If you made a batch of cookies using 4 cup of flour, how many
cups of sugar would you need?
O 54/35 cups of sugar for 4 cups of flour
O 1 19/35 cups of sugar for 4 cups of flour
O 6 6/35 cups of sugar for 4 cups of flour
5
NE
1
3
O 5 2/5 cups of sugar for 4 cups of flour
2

The answer is

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Common ratio, exponential function, half-life that's all i have so

So the first thing we do is to multiply the top equation by 3. the reason i want to do this is i notice there will be a 6y on both equations and can possibly add/subtract them. so we get 6y = -3x + 27. adding that and the second equation we get 6x = 27-15 which is 12. divide by 6 and we get 2. ∴ x = 2. substituting 2 into the first equation we get 2y = -2 + 9 which is 7. divide by 2 and we get 7/2. ∴ y = 7/2, x = 2.