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

5 0

3 years ago

Find the surface area of the composite figure

Maslowich

Answer:

498

Step-by-step explanation:

For the blue block: 4(7x2) + 2(2x2) = 56 + 8 = 64

For green block: 4(12x7) + 2(7x7) = 336 +98 = 434

434 + 64 = 498

3 0

2 years ago

The function y = f(x) is graphed below. What is the average rate of change of the

Yuliya22 [10]

Don’t know but hope you have a good day

7 0

1 year ago

What times what equals -20 and added together equals -8

Leto [7]

4 x -5 = -20 then 12 + -20 = -8

5 0

2 years ago