A=1/2(h)(3/4h)
A=3/8h²
h²=8/3(A)
h=√8A/3
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The third one :) I hope I did it right
After putting the value of y from the second equation to the first equation, the resultant equation is
.
GIven:
The equations are:

It is required to put the value of y from second equation to the first equation.
<h3>How to solve equations?</h3>
The value of y from the second equation is,

Now, put this value of y in the first equation as,

Therefore, after putting the value of y from the second equation to the first equation, the resultant equation is
.
For more details about equations, refer to the link:
brainly.com/question/2263981
So this is super easy :) Simply turn 15% into a decimal <span>0.15
5.85 is how much money she doesn't have to pay.
So she has to pay 33. 15</span>