Sam has an I-tunes card to purchase music after purchasing 7 songs his balance on the card is 41.25. The balance of the card was 27.50 after he purchased 18 songs. Define the domain and range and write a linear function that represents the balance of the card.

93.75

Step-by-step explanation:

well think about this he purchased 7 songs then he is left with $ 41.25 on his card then he bought 18 songs for 27.50 would tell you how much was used what it wants is for you to figure out the starting number using the  equation 7+18= 25 and 41.25+27.50= 68.70. which would make 68.70+ 25= 93.75  

i am sure it will be 90 degrees.

step-by-step explanation:

54 kilometers per hour

step-by-step explanation:

according to rules:

1 km = 1000 meter

which means that 1 meter = 1/1000 km

1 hour = 3600 second [ as 1 hour = 60 min = 60 *60 seconds ]

which means that 1 second = 1/3600 hour

therefore, 1 kilometer/hour =

thus to convert 15 meter per second to kilometer per hour, we multiply 15 to 3.6 kilometer/hour.

15 meter/second=   which is the required answer.