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
Answer:
36
Step-by-step explanation:
6+6=12 12+12=24 9+6=15 15+24=39
Answer:
88%
Step-by-step explanation:
Move the decimal two times to the right and add a percent sign.
0.41666666666 is 36 divided by 86.4
If they are independent, then P(A and B) is just P(A) times P(B). Which is 0.5*0.2=0.1