I’m going to take a wild guess and say C, but I’m not sure
Use Pythagoras's theorem.

Now, minus 12 from 15:
15 - 12 = 3,
which you need to square.
So the length of a = 9cm.
You can also do:

Which gets 9.
Hope this helps.
Answer:
13.A) y= 4/3 x+1
D) all real numbers
Step-by-step explanation:

Answer:
See explanation
Step-by-step explanation:
To solve the equation
graphically, we need to consider left and right parts of this equation separately.
Left side gives us the function
The graph of this function is shown with green curve in attached diagram.
Right side gives us the function
The graph of this function is shown with blue curve in attached diagram.
The x-coordinates of the points of their intersections are the solutions to the equation 
From the graph you can see that the solutions are

Answer:
1/2
Step-by-step explanation:
just because it is