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Nana76 [90]
3 years ago
5

Which graph correctly represents 3x + y > 7? NEED HELP!!

Mathematics
2 answers:
patriot [66]3 years ago
6 0
First rewrite the inequality in y = form.
3x + y > 7
Subtract 3x from both sides.
y > -3x + 7
Both graphs have a -3 slope and y intersect at 7. The only difference in the shading. Choose a test point to see if it makes the inequality true. The easiest point to choose is (0,0) if our line doesn't pass through that point.

0 > -3(0) + 7
0 > 7 is false so we want the graph where (0,0) is NOT shaded. That is the one on the left.
Andru [333]3 years ago
4 0
If the blue part is what is shaded, I'd say it's Graph B. But you can double check on a great website called "https://www.desmos.com/"

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In geometry, the perimeter of a shape is defined as the total length of its boundary.

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By using the distances formula find the length of the sides of the triangle:√[(x₂ - x₁)² + (y₂ - y₁)²],

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