Answer:
Part a) 
Part b) 
Step-by-step explanation:
we know that
The original area of rectangle is equal to

so
if the length is increased by 6% and the width is by 15%
then
the new area is equal to
![A=[1.06(14)][1.15(9.5)]\ cm^{2}](https://tex.z-dn.net/?f=A%3D%5B1.06%2814%29%5D%5B1.15%289.5%29%5D%5C%20cm%5E%7B2%7D)


The new area is (1.219) times the original area
Part a) Calculate the percentage change in area of the rectangle

convert to percentage

Part b) what is the original area as a percentage of the increased area of the rectangle?
Divide the original area by the increased area

Convert to percentage

It would sure help a lot if I could take a peek at the drawings of the triangles.
Answer:
x=9
Step-by-step explanation:
isolate the variable by dividing each side by factors that dont contain the variables.
can i get the crown?
all triangles have 180 total degrees, we know this
80 degrees are accounted for, so there's 100 left
3x - 25 = 100
3x = 125
x = 41.67