If rectangle and triangle are attached ....so
area of rectangle will be L×W
and area of triangle will be .5 × b×h
as we know both are attached then base would be equal to width
..so b=W !!!
If it decreases by 80٪, then only 20٪ remains.
15×20٪=15×20/100=15×0.2=3
Answer: 3
Answer:
and 
Step-by-step explanation:
At=As+Ar; A=b.h and
, then: At=(x+120)x so
(x+120)x=4500,
Applying cuadratic equation formula: