Question

Someone please help, thank you

Answer 1

Step-by-step explanation:

everything can be found in the picture

Answer 2

Answers:

(a) $n = 2(r+m)$

(b) $n = \frac{h^2}{9}$

===========================================

Work Shown:

Part (a)

$\frac{n}{2} - m = r\\\\\frac{n}{2} = r+m\\\\n = 2(r+m)$

In the second step, I added m to both sides. Afterward, I multiplied both sides by 2 to fully isolate n.

------------------------

Part (b)

$3\sqrt{n} = h\\\\\sqrt{n} = \frac{h}{3}\\\\n = \left(\frac{h}{3}\right)^2\\\\n = \frac{h^2}{3^2}\\\\n = \frac{h^2}{9}$

First I divided both sides by 3. After that, I squared both sides. The (h/3) squares to (h^2)/9.