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Fittoniya [83]
3 years ago
13

Find all solutions to the equation. 7 sin2x - 14 sin x + 2 = -5

Mathematics
1 answer:
Alenkinab [10]3 years ago
4 0
7sin²x-14sinx+2= -5
7sin²x-14sinx+7=0
7(sin²x-2sinx+1)=0
sin²x-2sinx+1=0
(sinx-1)(sinx-1)=0
sinx-1=0
sinx=1
x= \frac{ \pi }{2} +2n \pi  where n is an integer


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If the volume of a hemisphere is 92160 pie cubic cm then find<br>its radius.​
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Answer:

radius = 51.70 cm

Step-by-step explanation:

Volume = (2/3) π r³

Volume = 92160 π

Radius = ?

Using the above formula

V = (2/3) π r³

r³ = v/((2/3) π)

r³ = ((92160 π) x 3) / (2 x π)

r³ = 276480/2 because (π/π) = 1

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Taking cube root on both sides

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3 years ago
4^3-(24divided6)+8=?
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Answer:

68

Step-by-step explanation:

4^3-(24÷6)+8

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1. what is the first step in solving this equation?
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parenthesis PEMDAS

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Subtracting Fractions.<br><br> Fill in the blanks, and the tenth one is 4 2/3 + 7 7/10=
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Hello! Although I can't give you the answers automatically. I'll just show you some steps on how to subtract & if you're still not figuring it out just message me! :)

Step 1: You have to make sure both denominators are both exactly the same or you won't get the answer correctly.

Step 2: Then subtract the numerators

Step 3: Simplify if needed.

Ex; If I have 1/2 of the pizza and my friend has 1/6 of the pizza. What will be my result if I subtract the fractions?

We'll have to take 1/2 and 1/6. You'll have to find what makes those numbers, what I mean is by multiplying both numerators and denominators.

\frac{1}{2}  -  \frac{1}{6}  =
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Then you'll change the denominator into 1/2 = 1/6

Result:
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Hint: Denominator never changes when you have your final result. So it's 2/6. It needs to be simplified.

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I hope this example helped you understand how to subtract fractions & if you don't know how to add mixed fractions you can always do around the world or other examples your teacher can provide! :)
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