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OLga [1]
4 years ago
15

in triangle ABC, if the length of side b is 3 centimeters and the measures of angle B and angel C are 45⁰ and 60⁰, respectively,

what is the length of side c to two decimal places ​
Mathematics
1 answer:
statuscvo [17]4 years ago
7 0
<h3>Answer: 3.67 centimeters approximately</h3>

Use the law of sines to get this answer

b/sin(B) = c/sin(C)

c/sin(C) = b/sin(B)

c/sin(60) = 3/sin(45)

c = sin(60)*( 3/sin(45) )

c = 3.6742346 approximately

c = 3.67 rounding to nearest hundredth

Make sure your calculator is in degree mode.

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Y = x² + 7x - 5 Can be written in the form y = ( x + a )² + b. Find the value of a and the value of b.
Mamont248 [21]

Answer:

a=\dfrac{7}{2} \\\\b=\dfrac{49}{4} \\

Step-by-step explanation:

y=x^2+7x-5\\\\=x^2+2*\dfrac{7}{2}*x +\dfrac{49}{4} -\dfrac{49}{4} -\dfrac{20}{4} \\\\=(x+\dfrac{7}{2} )^2+\dfrac{69}{4} \\\\a=\dfrac{7}{2} \\\\b=\dfrac{49}{4} \\

8 0
3 years ago
Find the x-coordinates where f ' (x)=0 for f(x)=2x+sin(4x) in the interval [0, pi]
MAVERICK [17]

Answer:

The x-coordinate is \dfrac{\pi}{6}[/tex].

Step-by-step explanation:

We are given a function f(x) as:

f(x)=2x+\sin (4x)

Now on differentiating both side with respect to x we get that:

f'(x)=2+4 \cos (4x)

When f'(x)=0

this means that 2+4\cos (4x)=0\\\\4\cos (4x)=-2\\\\\cos(4x)=\dfrac{-1}{2}

Hence, cosine function takes the negative value in second and third quadrant but we have to only find the value in the interval [0,\pi].

also we know that \cos (\dfrac{2\pi}{3})=\dfrac{-1}{2}----(1) (which lie in the second quadrant)

so on comparing our equation with equation (1) we obtain:

4x=\dfrac{2\pi}{3}\\\\x=\dfrac{\pi}{6}

Hence, the x-coordinates where f'(x)=0 for f(x)=2x+\sin(4x) is \dfrac{\pi}{6}.

5 0
4 years ago
1. Walmart’s stock price started at $70. It went up by $2, then went down by $4. What is the final stock price?
Paul [167]

Answer:

68

Step-by-step explanation:

70+2-4= 68

3 0
3 years ago
what would be the answer. katlyn made 4 dresses with 7 yards of fabric. how many yards did she use on 1 dress
Kay [80]
1.75 yards .its simple you just have to see how much youll have to multiply by 4 to get 7
7 0
3 years ago
Read 2 more answers
Please help I will give brainliest if you are correct!
Over [174]

Answer:

About $676.5 billion will be spent at restaurants in 2018 if this trend continues

Step-by-step explanation:

I think if you have to round you round up to 677

5 0
2 years ago
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