how do i answer qustion d?

ENGR.ECONOMIC ANALYSIS
14th Edition
ISBN:9780190931919
Author:NEWNAN
Publisher:NEWNAN
Chapter1: Making Economics Decisions
Section: Chapter Questions
Problem 1QTC
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how do i answer qustion d?

Let z represent the number of items supplied or demanded each month and p represents the unit price of the items (in dollars).
Equation A is 8r + 5p = 240 and Equation B is –7a + 2p = 90.
Answer each of the following. Enter all answers below in exact, reduced form.
a. Which equation is the demand equation? Equation A v because it has a negative v slope.
b. How many items will consumers purchase if the items are free?
30
items
c. Above what price will consumers not buy the item?
$ 48
d. Producers will only provide the items if the price is above what value?
Transcribed Image Text:Let z represent the number of items supplied or demanded each month and p represents the unit price of the items (in dollars). Equation A is 8r + 5p = 240 and Equation B is –7a + 2p = 90. Answer each of the following. Enter all answers below in exact, reduced form. a. Which equation is the demand equation? Equation A v because it has a negative v slope. b. How many items will consumers purchase if the items are free? 30 items c. Above what price will consumers not buy the item? $ 48 d. Producers will only provide the items if the price is above what value?
Expert Solution
Step 1

Given

Equation B is a supply equation because it has positive slope

i.e,

-7x+2p=90

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