Sorry for the weird looking image help me please :)

1 : Go .....
[tex]A= bh \: [/tex]
Divided sides by b
[tex] \frac{A}{b} = h \times \frac{b}{b} \\ [/tex]
thus ;
[tex]h = \frac{A}{b} \\ [/tex]
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2 : Go .....
[tex]area = height \times length(base) \\ [/tex]
[tex]45 = h \times 9[/tex]
Divided sides by 9
[tex] \frac{45}{9} = h \times \frac{9}{9} \\ [/tex]
[tex]h = 5 \: ft[/tex]
And we're done...
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