Greenland, the largest island in the world, is 21 times larger than Iceland. The combined area of Greenland and Iceland is 880,000 mi2. Find is the area of Gree

Question

I dont understand how to do it please help me out.

Answer 1

Let G = Greenland and

I = Iceland 

 

G=21I

I + 21I = 880,000

22I=880,000

I=880,000/22

I=40,000

 

G=880,000 - 40,000

G = 840,000

Answer 2

Let g = Greenland and c = Iceland. Here's what we know:

g = 21c (Greenland is 21 times the size of Iceland)

g + c = 880000 (their combined area equals 880,000 mi²)

 

We have a value for a variable, so plug it in:

21c + c = 880000

Simplify:

22c = 880000

Divide both sides by 22:

^22c/₂₂ = ⁸⁸⁰⁰⁰⁰/₂₂

c = 40000

 

Now that we know Iceland's area, plug that into the first equation to get Greenland's:

g = 21 * 40000

I'll leave you to do that.