I think it’s 18/5 maybe idk try it!
Answer:
Height of fir tree = 9 meters
height of pine tree= 12 meters
Step-by-step explanation:
The combined height of one fir tree and one pine tree is 21 meters. The height of 4 fir trees stacked on top of each other is 24 meters taller than one pine tree.
Let x be the height of fir tree and y be the height of pine tree

Subtract x from both sides

height of 4 fir trees = pine tree +24

Substitute 21-x or y in the above equation

Add x on both sides

Divide by 5 on both sides
x=9
Now plug in 9 for x and find out y


y=12
Height of fir tree = 9 meters
height of pine tree= 12 meters
Your answer would be D. It is one-half the area of a rectangle with sides 4 units x 3 units. This is how you solve these problems. You have to draw a rectangle around the triangle Think about it, It wouldnt be double the surrounding rectangle and the dimentions are 3 x 4, not 4 x 4.
Hope I was most help to you!