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2 years ago

The angles of a triangle are 120 degrees. (x + 16) degrees, and X degrees.

Mathematics

1 answer:

Maksim231197 [3]2 years ago

4 0

Answer:

x = 22

Step-by-step explanation:

Adding all the degrees to a triangle must equal 180

120 + (x+16) + x = 180

2x + 136 = 180

-136. -136

2x = 44

$\frac{2x}{2} = \frac{44}{2}$

x = 22

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If sec theta = - √30 / 3, find cos theta.<br> if sin(-theta) = -0.97, find cos (π/2 - theta).

Cloud [144]

Step-by-step explanation:

$\cos \theta = \frac{1}{ \sec\theta } = - \frac{3}{ \sqrt{30} } = - \frac{3 \sqrt{30} }{30} = - \frac{ \sqrt{30} }{10}$

$\cos( \frac{\pi}{2} - \theta )= \cos \frac{\pi}{2} \cos \theta + \sin \frac{\pi}{2} \sin \theta$

Note that

$\sin( - \theta) = - \sin \theta$

$\cos \frac{\pi}{2} = 0 \: \: \: \: \: \sin \frac{\pi}{2} = 1$

Therefore,

$\cos( \frac{\pi}{2} - \theta ) = 0.97$

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3 years ago

Which planet is an inner planet, and which one is an outer planet? Explain your answer.

Paraphin [41]

Answer:

Planet A is an outer planet, and planet B is an inner planet. Inner planets rotate slowly, so they take more time to complete a rotation. Outer planets rotate faster, so they take less time to complete a rotation.

your welcome !!!

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3 years ago

You purchase a cell phone for $125. the value of the cell phone decreases by about 20% annually. write a function at models the

djverab [1.8K]

F(x)=125-(125*0.2x)
to find the value of the phone after 3 years, you put x=3.
f(3)=125-(125*0.2(3))
f(3)=50

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3 years ago

If the point (2,5) is on the graph of an equation, which statement must be

Hunter-Best [27]

Answer: D

Step-by-step explanation:

The values x = 2 and y = 5 make the equation true.

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3 years ago

Quare cm

Triss [41]

P=32cm
A= 64cm^2

Step by Step

Formula(Perimeter): P=s+s+s+s
S=side P=perimeter
P=8*4
P=32

Formula(Area for Square): A=s^2
A=Area s=side
A=8^2
A=84

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2 years ago