I need help with this question plz thx

Step-by-step explanation:

Hey there!

Given,

Combine like terms

Hope this helps :)

= -3y³ - 5x

Step-by-step explanation:

x - 3y³ + 3x³ - 5x - x³ - x - 2x³

= -3y³ + (3x³ - x³ - 2x³) + (x - 5x - x)

= -3y³ + 0  - 5x

= -3y³ - 5x

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.

do have an equation or graph or

step-by-step explanation: