Answer:
second one
Step-by-step explanation:
Because when you try to remove the brackets then you should multiply coefficient of x and coefficient of y by 2
So it will be 2x+18y
2*9=18
Answer:
B). 5.6
Step-by-step explanation:
3.2/x = 4/7
Then, cross-multiply
4x = (3.2) 7
4x = 22.4
x = 5.6
47/9+110/15=705/135+990/135=1695/135=12 15/27
Answer:
-2a -12
Step-by-step explanation:
a minus * a plus is a negative therefore -12

The given triangle is a right angled triangle,
so let's apply trigonometry here :
Now,
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