Lucas purchased 4 large posters and 6 small posters online and spent $21 on shipping. he spent x to ship each small poster and twice as much to ship each large poster. what is the cost of shipping a small poster? explain your thinking.

  $1.50

Step-by-step explanation:

The shipping cost of a large poster is 2x, so the total shipping cost is ...

  6x +4(2x) = $21

  14x = $21 . . . . . . . simplify

  x = $21/14 = $1.50 . . . . cost of shipping for a small poster

The cost of shipping a small poster is $1.50.

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

my name jeff

step-by-step explanation:

natural disasters at one point james charles' career