Answer:
17
Step-by-step explanation:
a1=2a7 because the square route of (Tan) is 49 so it 2a7tan49 fa10 the answer is b
Step-by-step explanation:
We have got the lines :

Both lines intercept the x-axis in the point :

In all point from x-axis the y-component is equal to 0.

We replace the I point in the lines equations:

From the first equation :

From the second equation :

Then 
Finally :

y = ax + b and y = cx + d have the same x-intercept ⇔ad=bc
1444 that is it ok my friend