Which equation results from adding the equations in this system?

2 answers:

german3 years ago

5 0

The table represents the relationship between the number of days, x, and the number of patients in a hospital showing flu symptoms.
100
18
13
Which statement is true?
The number of patients showing flu symptoms decreases at a constant rate as the number of days increases.
The number of patients showing flu symptoms decreases as the number of days increases but not at a constant rate.
The number of patients showing flu symptoms increases at a constant rate as the number of days increases.
The number of patients showing flu symptoms increases as the number of days increases but not at a constant rate.

Law Incorporation [45]3 years ago

4 0

Answer:

well, it's not c. Sorry I couldn't find the actual answer. Just took the test on edg

Step-by-step explanation:

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Solve the equation 3^(2x) -4*3^(x+1) + 27 = 0. use rules of exponents to change 3^(x+1)

Leviafan [203]

Answer:

$\huge\boxed{x=1\ \vee\ x=2}$

Step-by-step explanation:

$3^{2x}-4\cdot3^{x+1}+27=0\\\\\text{use}\ (a^n)^m=a^{nm}\ \text{and}\ a^n\cdot a^m=a^{n+m}\\\\\left(3^x\right)^2-4\cdot3^x\cdot3^1+27=0\\\\\left(3^x\right)^2-12\cdot3^x+27=0\\\\\text{substitute}\ 3^x=t>0\\\\t^2-12t+27=0\\\\t^2-3t-9t+27=0\\\\t(t-3)-9(t-3)=0\\\\(t-3)(t-9)+0\iff t-3=0\ \vee\ t-9=0\\\\t-3=0\qquad\text{add 3 to both sides}\\\boxed{t=3}\\\\t-9=0\qquad\text{add 9 to both sides}\\\boxed{t=9}$