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:
A number is twice as much when put added by 4 to equal 12
2x+4=12
Step-by-step explanation:
Answer:
their are 17 cows
Step-by-step explanation:
7x2=14
82-14=68
68/4=17
Using SohCahToa, we can find the height of the tree. Let the tree height be h. 8m is adjacent to the 30° angle.

The answer is A) 4.6 m