Question

can u tell the answers

Answer 1

Answer:

(1) 6y/5+4=16

6y/5=16-4

6y/5=12

6y=60

y=10

(2)we have

3x-13=8

3x=8+13

3x=21

x=7

now, x-1=7-1=6

(3) 3x+2(x+2)=20-(2x-5)

3x+2x+4=20-2x+5

5x +4=25-2x

5x+2x=25-4

7x=21

x=3

Answer 2

Answer:

$7$

Step-by-step explanation:

Let the ball dropped down is a and the ball thrown up is b. also the stone thrown upwards cover a distance of x and the other covers a distance of (100 –x).

For ball a

u=0

g=10m/s

2

d=(100−x)

Using the equation

s=ut+

2

1

at

2

100−x=5t

2

...

For ball b

d=x

g=−10m/s

2

u=25m/s

s=ut+

2

1

at

2

x=25t−5t

2

...

Solving equation (1) and (2)

100=25t

t=4seconds

Put the value of t in equation (1)

x=100−80

x=20m

They will meet at distance of 80 m from the ground after t = 4 seconds