Question

find the value of y (2y-20)(2y+40)​

Answer 1

Answer:

180= (2y-20)+(2y+40)

180=2y-20+2y+40

180=4y-60

180/60=4y

3=4y

3/4=y

so,now

2×3/4=6

Then,

6-20×6+40

=6-(20+40)

=60-6

=54

Answer 2

The value of y will be 30 degrees

Step-by-step explanation:

As you can see, the figure provided to you is a supplimentry angle.

So, the sum of both angles is 180 degrees.

Now l, add all, like this

(2y +20) + (2y + 40) =180

so it will become

4y + 60 = 180

4y= 180-60=120

y=120/4

y= 30 degrees

Hope you understand and find this solution helpfull