A website sells two different kinds of memberships. The silver membership costs 5.00 and the gold membership costs 7.50. The website earns 1822.50 in one day from selling a total of 307 memberships. How many gold memberships were sold that day?

115 gold memberships were sold that day.

Step-by-step explanation:

Let x represent the number of silver memberships that were sold that day.

Let y represent the number of gold memberships that were sold that day.

The website sold a total of 307 memberships in one day. This is expressed as

x + y = 307

The silver membership costs 5.00 and the gold membership costs 7.50. The website earns 1822.50 that day for selling both memberships. This is expressed as

5x + 7.5y = 1822.5- - - - - - - - - - -1

Substituting x = 307 - y into equation 1, it becomes

5(307 - y) + 7.5y = 1822.5

1535 - 5y + 7.5y = 1822.5

- 5y + 7.5y = 1822.5 - 1535

2.5y = 287.5

y = 287.5/2.5

y = 115

x = 307 - y = 307 - 115

x = 192

step-by-step explanation: 4 cause 2+2=4

-4, -2, 1, 4

step-by-step explanation:

domain = x values

range = y values