Question

Time ball left hand; Time ball returned hand
1st: 00:00:53 00:01:48
2nd 00:00:56 00:01:30
3rd 00:00:50 00:01:20
4th 00:00:60 00:01:46

Using your video and estimating a scale, comment on how accurate your calculation of maximum height is. Write out all your work and assumptions, i.e. using your height, you estimate the height of the ball to be twice your height).

Answer 1

Explanation:

a) 2x + 5y = 20

5y = - 2x + 20

y = -2x/5 + 4

( d)

2x + 5y = 20

x – 2y = 9 ( multiply the linear equation by 2)

2x + 5y = 20

2x - 4y = 18 subtract

9y = 2

y = 2/9

x – 2y = 9

x = 9 + 2y

= 9 + 2 * 2 / 9

= 85/9

therefore x = 85/9 and y = 2/9 (answer )

if the answer is useful pls mark as brainliest pl