If by decomposition you mean breaking it ino parts then
break it itno 2 triangles and 1 rectangle
left to right
triangle with base y and height h
h=10
y=3
area of traignel=1/2bh
aera=1/2(10)(3)
area=5(3)
area=15
rectangel of legnth x and height h
area=legnth timwe width
x=8
h=10
area=8 times 10
aera=80
last triangle
should be same as other sinces same base (y) and same height (h)
15
add
15+80+15=120
Answer:
9,765,625
Step-by-step explanation:
Answer:
120 I think.
Step-by-step explanation:
Because 10*12=120
Answer:
1)x=15
2)x=38
3)x=7
4)x=10
Step-by-step explanation:
First you had to expanded form.
Finally you can also add by similar to elements.
Final answer: 
Hope this helps!
And thank you for posting your question at here on brainly, and have a great day.
-Charlie
