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3 years ago

Help pleaseeee, I don't understand

Mathematics

1 answer:

miv72 [106K]3 years ago

3 0

Answer:

Step-by-step explanation:

2x+4-1

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Is the answer A ????? I don't know, plzzzz help me

-Dominant- [34]

I think very well that it is A or B. With my experience, but you might want to keep doing research.

8 0

3 years ago

Read 2 more answers

Which of the following points are on the line given by the equation y=1/2x

OLEGan [10]

Answer:

B, C, and F

Step-by-step explanation:

y = 1/2x

y = 1/2(4)

y = 2

y = 1/2x

y = 1/2(-2)

y = -1

y = 1/2x

y = 1/2(2)

y = 1

3 0

3 years ago

Ln(x+2)-ln(4x+3)=ln(1/2*x)

iris [78.8K]

ln(x+2)-ln(4x+3)=ln(1/2*x)

Using properties of logarithms

 $\frac{ln(x+2)}{ln(4x+3)} = ln \frac{x}{2}
\\ \\ \frac{x+2}{4x+3} = \frac{x}{2} 
\\ \\2(x+2)=x(4x+3)

2x+4=4x^2+3x
\\ \\ 4 x^{2} +x-4=0
\\ \\ x= \frac{-b+/- \sqrt{b^{2}-4ac} }{2a} 
\\ \\ x= \frac{ -1+/-\sqrt{1+64} }{8} 
\\ \\ x_{1} = \frac{-1+ \sqrt{65} }{8} 
\\ \\ x_{2} = \frac{-1- \sqrt{65} }{8} 

Check:

When you substitute x_{2} into
\\ \\ ln(4x+3)=ln(4* \frac{-1- \sqrt{65} }{8} ) =ln( \frac{-1- \sqrt{65} }{2} ) 

you will get negative number under ln, that is impossible ,


$

so x2 is not a solution of this logarithmic equation.

Only x1 is a solution.

3 0

3 years ago

Which of the following best describes the equation below?

Valentin [98]

If it’s 4x^3 I would say it’s nonlinear

5 0

2 years ago

Read 2 more answers

Distance between Train 1 and Train 2 = 95 miles.

Artist 52 [7]

9514 1404 393

Answer:

19/21 hours, about 54 minutes 17 seconds

Step-by-step explanation:

The time is found from ...

time = distance/speed

time = (95 mi)/(105 mi/h) = 95/105 h = 19/21 h

The trains will meet after 19/21 hours, about 54 minutes, 17 seconds.

4 0

2 years ago

Help pleaseeee, I don't understand​

Help pleaseeee, I don't understand