Adisplay has 6 packs of marbles with a total mass of 629g. the packaging of each pack has a mass of 2/3g and each marble has a mass of 4 1/2g. which equation can we use to determine m, the number of marbles per pack? a.6x4 1/2m+2/3=629 b.6m(4 1/2+ 2/3)=629 c.6m+4 1/2 +2/3)=629 d.6(4 1/2m +2/3)=629

D. 6·(4 1/2·m + 2/3) = 629

D

Step-by-step explanation:

got this on khan academy

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

13cm

step-by-step explanation:

(apex)