3 years ago

The perimeter of an equilateral triangle is 12 feet find the area of the triangle

Mathematics

2 answers:

expeople1 [14]3 years ago

5 0

I think your answer would be 6.93...idk. It’s kinda hard...!

myrzilka [38]3 years ago

4 0

I think it’s 6.93 but idk man ‍♀️‍♀️‍♀️

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Solve the system using substitution x+5y=0 3y+2x=-21

Crazy boy [7]

Answer:

$\left \{ {{x = -15} \atop {y=3}} \right.$

Step-by-step explanation:

$\left \{ {{x + 5y = 0} (1) \atop {3y + 2x = -21}(2)} \right. \left \{ {{x = -5y} \atop {3y + 2x = -21}} \right. \left \{ {{x = -5y} \atop {3y + 2*(-5y) = -21}} \right. \left \{ {{x = -5y} \atop {3y - 10y = -21}} \right. \\ \left \{ {{x = -5y } \atop {-7y = -21}} \right. \left \{ {{x = -5y} \atop {y= 3 }} \right. \left \{ {{x = -5 * 3} \atop {y=3}} \right.=> \left \{ {{x=-15} \atop {y=3}} \right.$