Acompany has to buy computers and printers. each computer, x, costs $585 and each printer, y, costs
$385. if the company spends $7,575 and buys a total of 15 machines, how many of each did it buy?

x = 9

y = 6

Step-by-step explanation:

Set up a system of equations

585x + 385y = 7575

x + y = 15

Solve for x for x + y = 15

x + y = 15 (Add -y to both sides)

x = -y + 15

Substitute -y + 15 for x in the first equation

585 (-y + 15) + 385y = 7575

-200y + 8775 = 7575 (Add -8775 to both sides)

-200y = -1200 (Divide both sides by -200)

y = 6

Substitute 6 for y in x = -y + 15

x = -6 + 15

x = 9

x = 9, y = 6

Step-by-step explanation:

Set up a system of equations.

x + y = 15

585x + 385y = 7575

substitute x = 15 - y in the second equation

585(15 - y) + 385 y = 7575

8775 - 585y + 385y = 7575

8775 - 200y = 7575

200y = 1200

y = 6

plug this y back into the first equation

x = 15 - 6 = 9

x = 9

answer: give more info

step-by-step explanation:

54 km / hours

step-by-step explanation:

we need to convert seconds to hours

60 seconds = 1 minutes

60 minutes = 1hour

15 m         60 second   60 minutes

  * *         = 54000 meters/ hour

second     1 minute             1 hour

now we need to convert meters to km

1000 m = 1 km

54000 m       1 km

*   = 54 km / hours

hour               1000m