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Stells [14]
3 years ago
11

Help please!!!!!!!!!!!

Mathematics
1 answer:
natita [175]3 years ago
6 0
3x-12 ≥7x+4
Subtract 3x from both sides
-12 ≥4x+4
Subtract 4 from both sides
-16 ≥4x
Divide each side by 4
-4 ≥x
From point 4, you use a closed circle and the arrow is facing towards 0
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Solve the equation on the interval [0,2π). cos^4x=cos^4xcscx
Luba_88 [7]
\bf cos^4(x)=cos^4(x)csc(x)\\\\
-----------------------------\\\\
cos^4(x)=cos^4(x)\cfrac{1}{sin(x)}\implies cos^4(x)=\cfrac{cos^4(x)}{sin(x)}
\\\\\\
cos^4(x)sin(x)=cos^4(x)\implies cos^4(x)sin(x)-cos^4(x)=0
\\\\\\
cos^4(x)[sin(x)-1]=0\to 
\begin{cases}
cos^4(x)=0\to x=cos^{-1}(0)\\
----------\\
sin(x)-1=0\\
sin(x)=1\to x=sin^{-1}(1)
\end{cases}

\bf \measuredangle x = cos^{-1}(0)\implies \measuredangle x = 
\begin{cases}
\frac{\pi }{2}\\\\
\frac{3\pi }{2}
\end{cases}
\\\\\\
\measuredangle x=sin^{-1}(1)\implies \measuredangle x=\frac{\pi }{2}

8 0
4 years ago
Quiz due today! Please help me. No links! 10 points
Phoenix [80]

Answer:

B

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
I can't figure out the equivalent fraction. Whoever gets it first gets brainliest, and please do explaination
cupoosta [38]

Factorize the numerator and denominator. You'll see that they both have a factor of 4 that can be canceled. The introduce a factor of 3 to change the denominator to 36.

\dfrac{28}{48} = \dfrac{4\times7}{4\times12} = \dfrac7{12} = \dfrac{3\times7}{3\times12} = \boxed{\dfrac{21}{36}}

6 0
2 years ago
Find an equation of the line l that contains the points left parenthesis 0 comma 0 right parenthesis(0,0) and left parenthesis 4
denis23 [38]
(0,0) and (4,1)
Find the slope: m = (y2-y1)/(x2-x1) = (1-0)/(4-0) = 1/4
Input m, x1, and y1 into the Point-Slope equation:
y - y1 = m(x - x1)
y - 0 = 1/4 (x - 0)
  y    = 1/4 x
4 0
4 years ago
Read 2 more answers
5 - (x + 5) &gt; -2(x + 4)<br> Help please
Ilya [14]
Solving for x :
x > -8
3 0
3 years ago
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