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zhuklara [117]
3 years ago
7

Which expression is equivalent to 8k - 4

Mathematics
2 answers:
DIA [1.3K]3 years ago
6 0

Answer:

4(2k-1)

Step-by-step explanation:

Sliva [168]3 years ago
5 0

Answer:

4(2k-1)

Step-by-step explanation:

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Jill was solving a system using the elimination method.After she added the equations together,she got 5=7.What does this mean fo
harkovskaia [24]

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It means the system does not have a solution

Step-by-step explanation:

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Which equation represents the circle shown on the graph below.
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C

Step-by-step explanation:

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WHAT IS HELP PLEASE <br><br> 6x2 -2x3 +x4 =?<br> DONT ANSWER TO GET QUICK POINTS
blondinia [14]

Answer:

i told you in the comment it equals 7

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Simplify the expression csc(-x)/1+tan^2x)
Charra [1.4K]
Assuming ya meant \frac{csc(-x)}{1+tan^2(x)}

to slimplify, we use a variation of the pythagorean identity and a decomposition into the sin and cos


for the pythaogreaon identity
cos^2(x)+sin^2(x)=1
divide both sides by cos^2(x)
1+tan^2(x)=sec^2(x) since \frac{sin(x)}{cos(x)}=tan(x)
subsitute
\frac{csc(x)}{sec^2(x)}

recall that csc(x)=\frac{1}{cos(x)}
also that cos(x) is an even function and thus cos(-x)=cos(x)
therfore csc(-x)=\frac{1}{cos(-x)}=\frac{1}{cos(x)}=csc(x)
so we get

\frac{csc(x)}{sec^2(x)}
decompose them into \frac{1}{cos(x)} and \frac{1}{sin^2(x)} to get \frac{\frac{1}{cos(x)}}{\frac{1}{sin^2(x)}}
multiply by \frac{sin^2(x)}{sin^2(x)} to get
\frac{sin^2(x)}{cos(x)}
we can furthur simlify to get
(\frac{sin(x)}{cos(x)})(sin(x))=tan(x)sin(x)
the expression simplifies to tan(x)sin(x)
5 0
3 years ago
Read 2 more answers
I think the answer is A is this correct? thank you!
likoan [24]

Answer:

x^2 = a/b (option a)

Step-by-step explanation:

If we have square root at the top and bottom then we take single square root with fraction inside

To remove square root we take square on both sides because square and square root will get cancelled

x^2 = a/b is true

6 0
3 years ago
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