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2 years ago

Celia bought a bag of 12 goldfish for $3dollar sign, What is the cost of 1 goldfish?

Mathematics

1 answer:

Pavlova-9 [17]2 years ago

5 0

one goldfish would be $3/12 = 25 cents

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Given: cos θ=-4/5, sin x = -12/13, θ is in the third quadrant,

USPshnik [31]

By definition of tangent,

tan(2θ) = sin(2θ) / cos(2θ)

Recall the double angle identities:

sin(2θ) = 2 sin(θ) cos(θ)

cos(2θ) = cos²(θ) - sin²(θ) = 2 cos²(θ) - 1

where the latter equality follows from the Pythagorean identity, cos²(θ) + sin²(θ) = 1. From this identity we can solve for the unknown value of sin(θ):

sin(θ) = ± √(1 - cos²(θ))

and the sign of sin(θ) is determined by the quadrant in which the angle terminates.

We're given that θ belongs to the third quadrant, for which both sin(θ) and cos(θ) are negative. So if cos(θ) = -4/5, we get

sin(θ) = - √(1 - (-4/5)²) = -3/5

Then

tan(2θ) = sin(2θ) / cos(2θ)

tan(2θ) = (2 sin(θ) cos(θ)) / (2 cos²(θ) - 1)

tan(2θ) = (2 (-3/5) (-4/5)) / (2 (-4/5)² - 1)

tan(2θ) = 24/7

4 0

2 years ago

What is the perimeter of △RST?

amid [387]

Answer:

Step-by-step explanation:

sorry if its wrong:/

3 0

2 years ago

Read 2 more answers

QUICK!

pochemuha

So,

In order to find numbers that are in between 3/8 and 6/7, Lucy must make common denominators first.

LCM of 8 and 7: 56

Multiply each fraction by the appropriate form of 1:
$\frac{3}{8} * \frac{7}{7}\ AND \ \frac{6}{7} * \frac{8}{8}$

$\frac{21}{56}\ AND\ \frac{48}{56}$

We can immediately see that any fraction with a numerator between 21 and 48 and a denominator of 56 will fit into the criteria Lucy needs.

The correct option is B.

4 0

3 years ago

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Find the value of x in the following parallelogram: 2x - 10 2x + 50

Lerok [7]

Answer:

-40

Step-by-step explanation:

7 0

2 years ago

What is a simple way to tell that −314 is not the slope of this graph?

MA_775_DIABLO [31]

Answer:

the slope should be going from top left to bottom right not bottom left to top right

7 0

2 years ago