3 years ago

Can a triangle be formed with the sides lengths of 7 cm, 5 cm and 12 cm?

Mathematics

1 answer:

laiz [17]3 years ago

5 0

Answer:

NO because 7+5=12

The sum must be larger (not equal to) the longest side. If it's exactly the same, there's no room to for the shorter two sides to angle up to form a triangle.

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Since you have y alone on one side of the equation......

Use substitution and plug in 1/2x-4 for y in the other equation.

$3x+2(1/2x-4)=23\\$

Distribute

$3x+x-8=23$

Combine like terms

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Add 8 to both sides

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Your answers are:

$y=-1/8\\x=31/4$

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