3a + 6b = 45
2a - 2b = -12....multiply by 3
----------------
3a + 6b = 45
6a - 6b = - 36 ...(result of multiplying by 3)
---------------add
9a = 9
a = 1
3a + 6b = 45
3(1) + 6b = 45
3 + 6b = 45
6b = 45 - 3
6b = 42
b = 7
solution is : (1,7)
Answer:
it is 2766628276262626828373636737 points
Step-by-step explanation:
no explanation needed lol
Step-by-step explanation:
Did you mean:
= (a - b)(a + b)
= a.a + b.a - b.a - b.b
= a² + ba - ba - b²
= a² - b²
What would you like to know? The total surface area? The lateral surface area? The volume, perhaps? The radius?
Answer:
7500 feet is the lowest sea level or half of the earth
Step-by-step explanation:
mark as brainliest