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Svetradugi [14.3K]
3 years ago
7

6. Do 2b + b and 3b have the same value when b is 1, 2, and 3? yes or no

Mathematics
1 answer:
Dmitrij [34]3 years ago
4 0
6) yes
7) yes
8)22/33?? Which can be simplified to 2/3
9) 18 times I think
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Can someone PLEASE help me with Trigonometry???
Svetach [21]
\bf sin^2(2\theta)-7sin(2\theta)-1=0\\\\
-------------------------------\\\\
sin(2\theta)=\cfrac{7\pm\sqrt{49-4(1)(-1)}}{2(1)}\implies sin(2\theta)=\cfrac{7\pm\sqrt{49+4}}{2}
\\\\\\
sin(2\theta)=\cfrac{7\pm\sqrt{53}}{2}\implies 2\theta=sin^{-1}\left( \frac{7\pm\sqrt{53}}{2} \right)
\\\\\\
\theta=\cfrac{sin^{-1}\left( \frac{7\pm\sqrt{53}}{2} \right)}{2}

but anyway, the numerator will give the angles, and θ is just half of each

\bf \theta=\cfrac{sin^{-1}\left( \frac{7\pm\sqrt{53}}{2} \right)}{2}\\\\
-------------------------------\\\\
sin^{-1}\left( \frac{7+\sqrt{53}}{2} \right)\implies sin^{-1}(7.14)\impliedby \textit{greater than 1, no good}
\\\\\\
sin^{-1}\left( \frac{7-\sqrt{53}}{2} \right)\implies sin^{-1}(-0.14) \approx -8.05^o
\\\\\\
\theta=\cfrac{-8.05}{2}\implies \theta=-4.025

ok... that's a negative tiny angle, is in the 4th quadrant, if we stick to the range given, from 0 to 360, so we have to use the positive version of it, 360-4.025

so the angle is 355.975°

now, the 3rd quadrant has another angle whose sine is negative, so... if we move from the 180° line down by 4.025, we end up at 184.025°

and those are the only two angles, because, on the 2nd and 1st quadrants, the sine is positive, so it wouldn't have an angle there
7 0
3 years ago
BRAINLIEST!! <br><br> which table is a function
Margarita [4]
The answer is b because none of the numbers are repeating
6 0
2 years ago
How can you analyze connections between linear equations and use them to solve problems​
Illusion [34]

Answer:



Step-by-step explanation:

for example

2x+6=10

6 0
3 years ago
$1.00 to 2/3 gallon
Allisa [31]

Answer:

$1.5/pound

Step-by-step explanation:

Number of pounds  = 8pounds

Cost of pasta = $12

Now;

  Unknown:

           cost per pound of pasta

Solution:

To find the cost per pound of pasta;

 Cost per pound of pasta  = \frac{cost of pasta}{number of pasta}  

  Cost per pound of pasta = \frac{12}{8}   = $1.5/pound

6 0
2 years ago
1 1/4 + 1 3/4 + 2 2/4
xenn [34]

Answer:


Step-by-step explanation:

8 1/2

6 0
2 years ago
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