Answer:

Step-by-step explanation:
AC = AB + BC



Add 7 to both sides:


Subtract 7x from both sides:

Divide both sides by 11:


Answer:

Step-by-step explanation:
see the attached figure with letters to better understand the problem
we know that
In the right triangle ABD

In the right triangle BCD

remember that
m< BAD=m<CBD
therefore

equate the equations



Answer:
The first column is transformation
The second one I have forgotten
Need other help
Answer:
y-b/x = a
Step-by-step explanation:
y-b/x = a
Answer:
C is the closest.,
Step-by-step explanation:
I am assuming that the 2 trapezoids CBEF and EFDA are similar (they are similar if the 3 horizontal lines are parallel).
Corresponding sides are in the same ratio , so:
3.4 / EF = EF / 7.6
EF^2 = 3.4 * 7.6 = 25.84
EF = 5.08