1/9 times 3/1 = 1/3. Now divide 1/3 by 5 or multiply by 1/5 and you get 1/15. There's your answer
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).
The distributive property: a( b + c) = ab + ac
3(x + 2) = 3x + 3 · 2 = 3x + 6
Answer: Stacy is correct. She used properly the distributive property, multiplying x and 2 by 3.
About 4 im not positive but I think it's correct if you subtract them after multiplying. FORGIVE ME IF IT'S NOT CORRECT.
