Question

please answer this?? I will mark them as brain list​

Answer 1

Answer:

550

Step-by-step explanation:

a³ + b³ = (a + b)(a² - ab + b²)

(a+b)² = a² + b² +2ab

a² + b² = (a+b)² - 2ab

In this case  a= a and b=2b

a² + 4b² = 10² - 30 = 70

by putting the value = a³ + 8b³ = (10)(55) =550

Answer 2

Step-by-step explanation:

Identify the physical changes from the following a) Melting of ice b) Rusting of iron c) Sublimation of iodine d) Burning of magnesium in air$Helo$$Helo$$Helo$