The product of the square of x and seven

"Product of" tells you to use multiplication of the two terms

"square of x" = x²

"seven" = ... the number... 7

Your equation (your answer for these problems) can take a few forms:

x² · 7

7 · x²

7(x²)

(x²)(7)

7x²

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