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Bogdan [553]
3 years ago
6

Which of the following is a solution to 2cos x + 1 = 0?

Mathematics
1 answer:
nlexa [21]3 years ago
3 0
The answer is b
2cos x + 1 = 0
2 cos x = -1
cos x = -1/2
x = cos^1(-1/2)
(cos inverse (-1/2))
x = 120°
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Please help me. will give brainliest
gtnhenbr [62]
You can use the vertical angles theorem to find the value of x.

2x+84=5x
84=3x
x=28
Now, since <TSV and >PSV are linear pairs, you can add PSV and TSV. To do this, you have to find the value of PSV. 
PSV=5x
x=28, so PSV = 5(28)
PSV=140°.
Now, find TSV.
180°-140°=40°

m<TSV=40°, or B.


5 0
3 years ago
Translate the following into a verbal expression:<br> X2 - 5
bekas [8.4K]
X times Two minus five
8 0
3 years ago
Read 2 more answers
Convert 336 hours to seconds
Rainbow [258]

Answer:

336 Hours = 1,209,600 Seconds = 1209600 Seconds\

Step-by-step explanation:

This conversion of 336 hours to seconds has been calculated by multiplying 336 hours by 3,600 and the result is 1,209,600 seconds.

8 0
3 years ago
Read 2 more answers
The sum of two numbers is 49 and the difference is 25 . What are the numbers?
OLEGan [10]

Answer:

x = 37 y = 12

Step-by-step explanation:

Let x be one number

Let y = other number

x+y = 49

x-y = 25

Add the equations together

x+y = 49

x-y = 25

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2x = 74

Divide by 2

2x/2 = 74/2

x =37

x+y = 49

37+y = 49

Subtract 37 from each side

37+y-37 = 49-37

y = 12

4 0
3 years ago
The scale on a map is 1 : 500000 <br> Two towns are 7cm apart on the map
KengaRu [80]

1 : 500,000

multiplied by 7 cm is

7 cm : 3,500,000 cm

= 7 cm : 35000.00 m . . . (100 cm in 1 m)

= 7 cm : 35 km . . . (1000 m in 1 km)

The actual distance between the towns is 35 km.

5 0
3 years ago
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