1.The answer would be D. 0.28 per lb per year.
2. The answer would be C. between 10 and 20 minutes.
Hope this helps:)
B. If you were to solve for x, the values would be x=1.5275 and x=-1.5275.
5th grade. ( my little sister)
You take the 3 squared which is 9 then, you divide that by three then you get 3
X=area of Sahara.
y=area of the Gobi Desert.
We suggest this system equations:
x+y=4000000
x=7y
solve by susbstitution method.
(7y)+y=4,000,000
8y=4,000,000
y=4,000,000 / 8=500,000
x=7y
x=7(500,000)=3,500,000
The area of Sahara=3,500,00 miles².
The area of the Gobi Desert=500,000 miles²
To check:
Te sum of their areas is : 3,500,000 miles²+500,000 miles²=4,000,000 miles²
Te area of sahara (3,500,000 miles²) is 7 times the area of the Gobi Desert (7*500,000 miles²=3,500,000 miles²).
