Maria paid $.80 for some packages of cards she sold all but 18 packages for two dollars each making a profit of $48 how many packages of cars does she buy?

Maria bought 70 packages

Step-by-step explanation:

Maria bought n packages of cards at $0.80 per package.

She sold n - 18 packages at $2.

She made a profit of $48.

Profit = (Amount of money made selling packages) - (Amount of money spent buying packages)

Profit = $48 = ($2)(n - 18) - ($0.80)n

2(n - 18) - 0.80n = 48

2n - 36 - 0.80n = 48

1.2n - 36 = 48

1.2n = 84

n = 70

Maria bought 70 packages

the above table 1 will calculate the population size (n) after a certain length of time (t). all you need to do is plug in the initial population number (no), the growth rate (r) and the length of time (t). the constant (e) is already entered into the equation. it stands for the base of the natural logarithms (approximately 2.71828). growth rate (r) and time (t) must be expressed in the same unit of time, such as years, days, hours or minutes. for humans, population growth rate is based on one year. if a population of people grew from 1000 to 1040 in one year, then the percent increase or annual growth rate is 40/1000 x 100 = 4 percent.

step-by-step explanation: