Soal Pilihan Ganda PRETEST Matematika Ekonomi

What is the role of mathematics in economic analysis?

• As a tool to entertain economists

• As a tool to visualize economic data

• As a tool to increase economic income

• As a tool for analysis and forecasting in economics

Why are mathematical models used in economics?

• To simplify everyday calculations

• To make economic theories look more complex

• To understand the relationships between economic variables more clearly

• To reduce the need for statistical data

What is the role of utility functions in mathematical economics?

• To calculate national income

• To evaluate consumer preferences

• To determine interest rates

• To predict stock market trends

If there is a linear relationship between the variables x and y expressed by the equation y = 3x + 5, what is the value of y if x = 4?

• 12

• 17

• 20

• 22

In a study, the number of sales S is related to the number of advertisements I conducted through the equation S = 10I + 50. If the number of advertisements is increased from 2 to 5, what is the expected increase in sales?

• 30

• 50

• 70

• 100

If z is inversely proportional to x, and z = 8 when x = 2, what is the value of z when x = 4?

• 2

• 4

• 6

• 8

The demand function for a good is given by Q_d = 50 - 2P, where Q_d is the quantity demanded and P is the price of the good. If the price of the good P is 15, what is the quantity demanded?

• 10

• 20

• 30

• 50

In a company, the relationship between production cost C and the number of units produced x is expressed by the equation C = 100 + 5x. If the total production cost is 200, how many units are produced?

• 10

• 20

• 5

antara biaya produksi (C) dan jumlah unit yang diproduksi (x) dinyatakan dengan persamaan C = 100 + 5x. Jika biaya produksi total adalah 200, berapa unit yang diproduksi?

• 10

• 20

• 50

• 100

Sederhanakan ekspresi berikut: 3x + 4x - 2x.

• 5x

• 7x

• x

• 9x