3 years ago

Pleaseeeee help im horrible at math

Mathematics

2 answers:

Alex787 [66]3 years ago

4 0

3/4 is the correct answer

Murljashka [212]3 years ago

3 0

Answer:

The Answer is gonna be D. 2

This is the right Answer:3

I hope you are having a great day ❤️❤️❤️

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-4+x= -11 please answer it

Slav-nsk [51]

Answer:

x=-7

Step-by-step explanation:

add 4 to both sides. leaving you with x=-7

8 0

3 years ago

Read 2 more answers

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:

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