contestada

Lighting the Home Depot recently sold 8.5-watt LED bulbs for $ 3.97 each and 18-watt LED bulbs for $8.97 each. If river memorial hospital purchased 200 suck bulbs for a total of $1494, how many of each type did they purchase?

Respuesta :

Answer:

Step-by-step explanation:

let number of 8.5 -watt bulbs=x

and number of 18 -watt bulbs=y

x+y=200

x=200-y

3.97 x+8.97 y=1494

3.97(200-y)+8.97 y=1494

794-3.97 y+8.97 y=1494

5y=1494-794=700

y=140

x=200-140=60

number of 8.5- watt bulbs=60

and number of 18-watt bulbs=140

Otras preguntas