Question

please answer these questions with step by step explanation ​

Answer 1

Answer:

1)40°.

2)a²+b²+2ah+a²+b²-2ab)

=4ab..

Step-by-step explanation:

Hope it helps u!

Answer 2

Answer:

(1) Initial temperature = 28°C

Final temperature = [ { (28°C - 7°C) +15°C } - 9°C ]

                                = [ { 21°C + 15°C } -9°C ]

                                = [ 36°C - 9°C ]

                                = 27°C

(2) 2$a^{2}$ + 2$b^{2}$

Difference between inital and final temperature = 1°C

HOPE  ITS  HELPFUL

MARK  AS  BRAINLIEST