Answer:
-4+(-4.6)
Step-by-step explanation:
When the ball is held up, it has a lot of potential energy and no kinetic energy. As it falls, it starts losing it's potential energy and speeds up to get more kinetic energy. When it hits the floor it has no potential energy, but lots of kinetic energy.
First solve the first equation to find x.
x-5=2
x=7
Now plug it in to the other equation to get your answer.
6(7)-20
42-20
22
The answer is 22.
Step-by-step explanation:
2x - 3y = 4
5x - 3y = 7
Simultaneous equation
Through elimination method
2x - 3y= 4
<u>+</u><u>5x -3y = 7</u>
7x =11
Divide bith sides by 7
x = 1 4/11
substitute x for 1 4/11 in the first equation
2(11/4) - 3y = 4
22 - 3y = 4
22 - 4 = 3y
18 = 3y
Divide bith sides by 3
y = 6
Therefore,
x = 11/4
y = 6