Combine like terms and write 4y + 5y^2 - 6 - 5y + 27 - y^2 in standard form. A.) 4y^2-y+21
B.) 4y^2-9y*21
C.) 3y^2+21
D.) 6y^2-y+33

PLEASE HELP!

step-by-step explanation:

ok so im not 100% sure but you would start by adding 5.1t and 1.9t beacuse they have the same variable. that is 7t.   then add -3.6 + 1.2 which is -2.4

so then keep that as -2.4 + 7t. i apologize if this is incorrect. best luck on your test < 3

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

-22

times both sides by 2, times () by 8, add alile terms, move terms, add alike and caculate divide both sides by 3