Urgent help! Hurry!! Urgent help!

Find a place to buy a computer, redo the system again, and get it for 30 yuan.

How many bucks to buy an operating system? Go to the computer city to reinstall the system!

ab=30，bc=40

Hook three strands four strings five, so ac=50

Let the length of the long side of the rectangle be x, i.e., de=fh=x

abc∽△hbf

bh=3x/5，bf=4x/5

ah=ab-hb=30-3x/5

Adh HBF again

ah：hf = dh：bf

Rectangle width dh = ah * bf hf = (30-3 x 5) * 4 x 5 x = 24-12 x 25

Rectangle area y=hf * dh = x(24-12x 25) =12 25(x 2-50x) =12 25(x-25) 2 + 300 300

That is, the maximum area is 300 cm2

I can't do math, I only know physics!

1. Q: How many kilometers did the truck travel east? A: Starting from A, the truck traveled 15 kilometers east.

2. Ask (to the east, to the west). What if the truck had driven 15 kilometers east first?

Answer: "If the truck travels east first - 15 km", then starting from A, the truck travels west first 15 km.

13. There are x boys and y girls.

x+y=41

x+y/2=30

x=19,y=22 The soil is carried by 1 person with 1 pole, and the soil is carried by 2 people with 1 root.

14. Set x people to produce round iron sheets, and Y people to produce rectangular ones.

x+y=42

120x÷2=80y

The essence of a patent dispute is the ownership and use of the patent right, and since the right and wrong are not clear in the attribution, the transfer is likely to be flawed, depending on how the court decides the patent right. If the patent right does not exist or is defective, the assignment shall also be revoked or declared invalid.

As to whether "bona fide acquisition" applies, it depends:

1.Whether the third party acquired the right in good faith.

2.Whether the third party paid a reasonable consideration.

There has been a transfer of rights, the trial should be terminated and a third person should file a new lawsuit.

6 km, 2 m2 m2, 1 gram, 64 ml, 20 m, 5 m3, decimere, 40 m2.