ANSWER QUICK PLEASE I HAVE A FEW MINUTES LEFT a rock is sitting at the top of a hill that is 21 m high. The rock weighs 12 n. calculate the rocks potential energy

  252 J

Step-by-step explanation:

The potential energy of the rock is the product of its height and its weight:

  PE = (mg)h = (12 N)(21 m) = 252 N·m = 252 J

The rock's potential energy is 252 joules.

yes

Step-by-step explanation:

fa tha first one you gonna add y to both sides

it look like this

x-y+y=6+y

x=y+6

therefore your answer is

x =y+6

fa tha second one

you gonna flip tha equation

it gonna look like x-4y=y

then add 4 to both sides

it gonna look like tha

x-4 +4 =y +4

so therefore tha answer is x=y+4

step-by-step explanation:

5   1/4   miles per hour

step-by-step explanation:

15   3/4 / 3 = 5   1/4