Suppose the radius of a cylinder changes, but its volume stays the same. How must the height of the cylinder change? A. The height doesn't change.
B. If the radius increases, then the height must increase
C. If the radius decreases, then the height must decrease.
D. If the radius increases, then the height must decrease.
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arrange the equations with like terms in columns.

analyze the coefficients of x or y.

add the equations and solve for the remaining variable.

substitute the value into either equation and solve.

check the solution.

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

i think its a and d

step-by-step explanation: