3 years ago

If x ¤ y = (x + y)² - (x - y)² Then √5 ¤ √5 =

1 answer:

5 0

$x\ \diamond\ y=(x+y)^2-(x-y)^2=x^2+2xy+y^2-(x^2-2xy+y^2)\\\\=x^2+2xy+y^2-x^2+2xy-y^2=4xy\\\\\sqrt5\ \diamond\ \sqrt5=4\cdot\sqrt5\cdot\sqrt5=4\cdot5=20$

You might be interested in

Two boats started to move towards each other from two boat stations, located 30 miles apart. One boat moved at a speed of 3 mile

Ganezh [65]

Answer: <u>3 hours and 20 minutes</u>

Step-by-step explanation:

3x + 2(3)x = 30

3x + 6x = 30

9x = 30

9/9 = 30/9

x = 3 1/3 hours

6 0

3 years ago

Victoria has 2.50 pounds of bell peppers and the cost is $1.25. What is the price for 1 pound of bell peppers?

AleksAgata [21]

Answer:

The price of one pound of bell peppers is $0.6.

Step-by-step explanation:

This problem is equivalent to the following:

<em>"if 10 oranges cost $20, how much does 1 orange cost? "</em>

and the answer to that question is:

price of 1 orange = $20/ 10 oranges = $2 per orange.

Put simply, we divided the total price by the total number of items, and we shall do the same thing for the case of bell peppers:

price of 1 pound = $1.25/ 2.5 pounds = $0.5/ pound.

The price for 1 pound of bell peppers is $0.5.

8 0

3 years ago

Nine and twenty hundredths as a decimal

Novosadov [1.4K]

Answer:

0.920

I think this is right

8 0

3 years ago

Given: LM ON and LO MN

Klio2033 [76]

Hello! Here you go :)

3 0

3 years ago

Anna earns $60 plus $2.50 for each table she cleans. Write and solve an inequality to find how many tables she must clean to ear

Marina86 [1]

Answer:

84.5

Step-by-step explanation:

65.50 she will need 84.5 which is 84 dollard and 50 ct

8 0

3 years ago