Answer these two questions precisely : )
1. using the expression 7x = 3y, if y is 35, what is x?
a. 15
b. 21
c. 35
d. 105
2. bruce has 97 sports cards. 34 of them are football cards. which equation can be used to find the number of sports cards y that are not football cards?
a. 97 + 34 = y
b. y + 97 = 34
c. 34 + y = 97
d. y - 97 = 34

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