#1
Divide into two rectangles


#2

#3

Answer:
7
Step-by-step explanation:
=(7-3)+6÷2
=(7-3)+3
=4+3
=7
ANSWER
The length of the altitude is
units
<u>EXPLANATION</u>
The altitude of a triangle is the vertical height of the triangle.
From the diagram the altitude is 
Method 1: We can use Pythagoras theorem to find 




We take the square root of both sides,




Method 2 Using Trigonometry




I think it's b but i'm not sure!
Answer:
13x + 2y + 8
Step-by-step explanation:
hope it helps......