2 years ago

Khan academy question

Mathematics

2 answers:

AleksAgata [21]2 years ago

8 0

Answer:

$(2, 5)$

Step-by-step explanation:

$y=2x+1$

$x-y=-3$

$x-(2x+1)=-3$

$x-2x-1=-3$

$-x-1=-3$

$-x=-3+1$

$-x=-2$

$x=2$

$y=2x+1$

$y=2(2)+1$

$y=4+1$

$y=5$

andriy [413]2 years ago

4 0

Answer:

(2,5)

Step-by-step explanation:

There you go.........

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ludmilkaskok [199]

Answer:

Larger angle: 104 degrees

Smaller angle: 76 degrees

Step-by-step explanation:

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2 years ago

The area of Sahara desert is 7 times the area of the Gobi Desert. If the sum of their areas is 4,000,000 square miles, find the

ryzh [129]

X=area of Sahara.
y=area of the Gobi Desert.
We suggest this system equations:
x+y=4000000
x=7y
solve by susbstitution method.
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8y=4,000,000
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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).

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2 years ago

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Answer:

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Step-by-step explanation:

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