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sattari [20]
3 years ago
13

((PLEASE HELPP)

Mathematics
1 answer:
lozanna [386]3 years ago
3 0

Answer:

1 has 1 solution

2 has one solution

3 has no solutions The lines are parallel

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How do i solve this exponential equation<br>​
Novay_Z [31]

Answer:

  x = 0 or 1/2

Step-by-step explanation:

Solving an exponential equation of this nature with different bases and coefficients is always a bit of an ad hoc affair. Here, we can divide by the right side expression and make a substitution that turns it into a quadratic.

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  3\cdot16^x+2\cdot81^x=5\cdot36^x\\\\0.6\left(\dfrac{4}{9}\right)^x+0.4\left(\dfrac{9}{4}\right)^x=1\\\\\textsf{Let $z=\left(\dfrac{4}{9}\right)^x$}\\\\0.6z+\dfrac{0.4}{z}=1\qquad\text{after substitution}\\\\3z^2-5z +2 = 0\qquad\text{multiply by $5z$ and put in standard form}\\\\(3z-2)(z-1)=0\qquad\text{factor}\\\\z=\dfrac{2}{3}\quad\text{or}\quad z=1\\\\x=\dfrac{\log(z)}{\log(4/9)}=\boxed{\dfrac{1}{2}\quad\text{or}\quad 0}

_____
<em>Additional comment</em>

A graphing calculator often solves these very nicely, especially when the equation is put into the form f(x) = 0.

3 0
2 years ago
Welding a heavy steel plate with a V groove joint required 1,248 ounces of filler. The plate was 3" thick and 208 " long. How ma
den301095 [7]

Answer:

c

Step-by-step explanation:

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8 0
3 years ago
I need to find the area of this irregular polygon. Any guidance is appreciated.
jeka94
Add everything up and u should get
4 0
3 years ago
Please help me with this!!!! Tyyyyyy
Anna35 [415]

Answer:

Step-by-step explanation:

I don't know what it's asking for but I assume what is angle B so we'll go with that. I think it's B 129 because it's right across from angle F which looks almost identical and is 130 degrees that's a 1 degree difference.

4 0
3 years ago
An equation is given below.
Arturiano [62]
The first step to solving this is to collect the like terms in this equation,, which are all the numbers with an x variable attached to them.
8.5x = -25.5
Now all you need to do to find x is divide both sides of the equation by 8.5
x = -3
This means that in order to make this equation true,, x must be -3.
Let me know if you have any further questions
:)

8 0
4 years ago
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