WX intersects YW at point Q.

What is the value of x in degrees?

x = 25

Step-by-step explanation:

the 2 angles are vertical angles which means they are equal so basically you do 4x-12=88, 4x=88+12, 4x=100, x=100/4, x=25

1800 J

Step-by-step explanation:

At point A when the cart is not in motion, it only has potential energy.

We know that potential energy is given by mgh where m is the mass of the cart, g is acceleration due to gravity and h is the height.

Substituting 12 kg for m, 10 m/s2 for g and 15 m for h then

PE= 12*10*15=1800 J