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djyliett [7]
3 years ago
5

Help with question 9 I don't get it

Mathematics
2 answers:
Alik [6]3 years ago
5 0
I think that x may equal to -3. Because the sum of a triangle is always 180. 55+54=109 and 180-109=71 and -3+74=71
Margarita [4]3 years ago
5 0
Instead of = 360 it should be 180

X+183=180
X= -3

X is -3 that does not make the angle negative 3X -3+74 which is 71 for the angle but it is equal to -3
If you add 55+54+71= 180
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The height, h, in feet of a piece of cloth tied to a waterwheel in relation to sea level as a function of time, t, in seconds ca
adelina 88 [10]

Solving the trigonometric equation, it is found that it takes 40 seconds to complete one turn.

The height is modeled by:

h(t) = 15\cos{\left(\frac{\pi}{20}t\right)}

The initial height is h(0) = 15, hence, one turn is completed when h(t) = 15.

h(t) = 15\cos{\left(\frac{\pi}{20}t\right)}

15 = 15\cos{\left(\frac{\pi}{20}t\right)}

\cos{\left(\frac{\pi}{20}t\right)} = \frac{15}{15}

\cos{\left(\frac{\pi}{20}t\right)} = 1

The length of one turn is of 2\pi, and \cos{(2\pi)} = 1, hence, the solution is found according to:

\frac{\pi}{20}t = 2\pi

t = \frac{40\pi}{\pi}

t = 40

It takes 40 seconds to complete one turn.

You can learn more about trigonometric equations at brainly.com/question/24680641

8 0
3 years ago
What are all the solutions of x2 + 3x – 4 = 0?
neonofarm [45]

Quadratics have 2 solutions

Factor the Quadratic

x^2 +3x -4 = 0

(x-1) (x+4) = 0

set each term = 0

x-1=0   x+4 = 0

solve

x=1    x=-4

The solutions are 1, -4


3 0
3 years ago
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gregori [183]
140 words divided by 4 minutes = 35 words per minute
8 0
3 years ago
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In a certain neighborhood there are 25 dogs and 10 cats. In a neighborhood across the way, the ratio of cats to dogs is the same
Akimi4 [234]

28 because 2.5 times 8 equals 20 plus that 8 equals 28.

Step-by-step explanation:

6 0
3 years ago
A, B and C are collinear points. B is between A and C. AB=12 BC=18 AC=3x Find X.
SCORPION-xisa [38]

Answer:

x =10

Step-by-step explanation:

Given

AB = 12

BC = 18

AC = 3x

Required

Solve for x

Since B is in between both points, then:

AC = AB + BC

This gives

3x = 12 + 18

3x = 30

Divide by 3

x =10

3 0
3 years ago
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