99.0k views
3 votes
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.

User BLT
by
8.1k points

1 Answer

7 votes

Answer:

Fir tree = 9

Pine tree = 12

Explanation:

I'm assuming you need the height of the pine and fir tree.

Set the height of the pine tree to p and the height of the fir tree to f.

Now set up equations:

The combined height is 21 -

f + p = 21

4 fir trees is 24 taller than 1 pine tree -

4f = p + 24

Subtact 24 from both sides

4f - 24 = p

Now substitute 4f - 24 = p into the first equation

f + (4f - 24) = 21

SImplify:

f + 4f - 24 = 21

5f - 24 = 21

Add 24 on both sides

5f = 45

Divide by 5 on both sides

f = 9

The height of the fir tree is 9 meters.

Now put the 9 into the f + p = 21

f + p = 21

9 + p = 21

Subtract 9 on both sides

p = 12

The pine tree is 12 meters tall.

User Nakkia
by
8.3k points
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories