Help me pleasee thank you so much in advance

Mathematics

1 answer:

Sholpan [36]3 years ago

8 0

Equation-> 2x-3=x+12
x= 15

Bisector means it cuts it in half so angleABD and angleDBC are equal hence the equation of 2x-3= x+12

Add 3 both sides
2x=x+15
Subtract x both sides
X=15

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Read 2 more answers

My assignment says The perimeter of a rectangle is 30 cm.

ale4655 [162]

Let side be "a" cm. So another side is (30-2a)/2=15-a
S=ab=a(15-a)=15a-a^2 - parabola
maximum when a = -15/-2=7.5 cm
When a=7.5 all sides are 7.5 cm
So it's a square. S=a*a=7.5*7.5=56.25 cm^2 - max
There is no global minimun for S.(look at the graphic)