Given that triangle ABC is right angle triangle. CD is altitude such that AD=BC
ABC is a right angle triangle so apply Pythogorean theorem

(Given that AD = BC)
(Given that AB=3)
...(i)
ADC is a right angle triangle so apply Pythogorean theorem



...(ii)
Plug value (ii) into (i)





Hence final answer is 
Times means
2 times 3 means 3+3
4 times of 3=3+3+3+3
divide is
4 divided into 2 parts=2
6 divided into 3 parts=3
but you could multiply by a fraction and essensially divide
they are different
180-50=130
x-y=130
x+y=50
2x=180
x=90
90+y=50
y=50-90
y=-40

(a) For dx/dt=6, dy/dt = 2·6 = 12
(b) For dy/dt=2, 2 = 2·dx/dt ⇒ dx/dt = 1
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The value of x is irrelevant for this question.
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If your function is 2^x +1 or 2^(x +1), it needs to be written as such. The answer above applies to the function given.