Answer:
option D is the correct answer
9514 1404 393
Answer:
(x, y) = (2/5, 1)
Step-by-step explanation:
Substitute for y and solve for x.
1 = -5x +3
-2 = -5x . . . . . . subtract 3
2/5 = x . . . . . . divide by -5
The solution is (x, y) = (2/5, 1).
490J
Step-by-step explanation:
Given parameters:
Mass of rock = 5kg
Height of hill = 10m
Unknown:
Potential energy at the hilltop = ?
Solution:
Potential energy is the energy at rest of a body. it is given as:
P.E = mgh
m is the mass of the body
g is the acceleration due to gravity = 9.8m/s²
h is the height of the hilltop
P.E = 5 x 10 x 9.8 = 490J
Learn more:
Potential energy brainly.com/question/10770261
#learnwithBrainly
Answer: 1.30 every km
Step-by-step explanation:
to find the speed per km, you do 41 divided by 31.
41/31= 1.30 per km (rounded)
