Rachel spends her entire income and consumes 5 packs of blackberries and 6 packs of oats. The price of blackberries is twice the price of oats per pack. Rachel's income doubles and the price of oats doubles, but the price of blackberries stays the same. If Rachel continues to buy 6 packs of oats, what is the maximum number of blackberries packs that she can afford?

Please, insert numerical value only.

Suppose that David has CZK 440 to spend on milk and breakfast cereals. One cereals pack costs CZK 60. Tesco offers a discount on milk; the discounted price is CZK 10 for one milk bottle. However, one consumer might buy a maximum of 10 bottles for the discounted price. If David buys more, he pays an undiscounted price CZK 20 per bottle. Suppose that David buys 12 bottles of milk. How many cereal packs could he afford to buy then?

Suppose  a consumer maximizes her utility subject to her budget by choosing a consumption bundle where the ratio of her marginal utilities of beef and pork, MU_B /MU_P, is greater than the ratio of the prices of beef and pork, p_B/p_P, then she must

Rachel spends her entire income and consumes 4 packs of strawberries and 8 packs of oats. The price of strawberries is twice the price of oats per pack. Rachel's income triples and the price of strawberries packs doubles, but the price of oats packs stays the same. If Rachel continues to buy 4 packs of strawberries, what is the maximum number of oats packs that she can afford?

Please, insert numerical value only.

Richard has well-behaved preferences and consumes only oranges and apples. Apple is a normal good, while orange is an inferior good for Richard. The price of apples increases, and his income increases simultaneously. After this change in price and income, Richard is as well off as before the change in his new optimum. Which of the following statements is TRUE?

Rachel's preferences for cups of coffee (x) and muffins (y) might be represented by the utility function u(x,y) = min(2x,2y). The price of coffee (p_x) is p_x=50, the price of muffins (p_y) is p_y=30, and her income is m=400. Suppose that the price of muffins increases to 50. Calculate the change in demand for muffins due to the income effect. Write the correct sign!

Suppose that the price of good x changes.

Eva consumes chocolate bars and oranges. The price of oranges decreases and the price of chocolate bars remains constant. The change in Eva's demand for oranges driven only by the income effect of this price change is:

Suppose that a consumer has monotonic and strictly convex preferences and consumes goods x and y. The consumer maximizes his utility with respect to his budget constraint. If the price of x  is p⁰_x (and the price of y is p_y), the consumer demands the bundle (x⁰*, y⁰*) and reaches the utility level u⁰. Now suppose that the price of good x decreases to p¹_x. After the price change, the consumer demands the bundle (x¹*, y¹*) and reaches the utility level u¹. 

Suppose that you maximize your utility given income and prices and consume only apricots and raspberries. Your preferences are monotonic. If the price of apricots goes up, I observe you buying fewer raspberries. Which of the following statements would be consistent with this observation (Hint: Drawing a graph might help you find the answer):