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mr_godi [17]
3 years ago
10

Which expression is equivalent to cos 120°?

Mathematics
1 answer:
ryzh [129]3 years ago
4 0

Answer:

cos 120° = -1/2

Step-by-step explanation:

cos 120° =  (adjacent side) / (hypotenuse.

Here the adjacent side (the side next to the central angle in this 30-60-90 triangle) is -1.  Then the hypotenuse is 2 and the opposite side is √3.

Thus, cos 120° = -1/2

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Unit 6 homework 4 anwsers
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Answer:

is there a picture that u could send

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3 years ago
-11+3(b+5)=7 what is b
evablogger [386]

Answer:

b=1

Step-by-step explanation:

-11+3(b+5)=7

-11+3b+15=7

-11+15+3b=7

4+3b=7

3b=7-4

3b=3

3b/3=3/3

b=1

hope it's helpful

8 0
2 years ago
Read 2 more answers
This year, benny is 12 years old, and his mom is 48 years old. In how many years will benny be 50% of his mom's age
Dahasolnce [82]
It will take 12 years for Benny to reach his moms height.

Benny’s mom: 48
Benny: 12

Half of 48 is 24, so Benny will have to turn 24.

24 - 12= 12
7 0
2 years ago
Simplify <br> 3(x - 6) - 4(x + 3).<br> A)-x - 30<br> B)-x - 9<br> C)-x - 6 <br> D)-x - 30
morpeh [17]

Answer:

-x-30

Step-by-step explanation:

<em>first you need to </em><em>distribute</em><em>:</em>

<em>3(x)+3(-6) -4(x)+ (-4)(3)</em>

<em>Then you </em><em>multiply:</em>

<em>3x+(-18)-4x+(-7)</em>

<em>then you </em><em>combine like terms:</em>

<em>3x-4x= -1x </em>

<em>-18+(-7)= -25</em>

<em>simplified:</em>

<u><em>-1x-30</em></u>

3 0
3 years ago
Read 2 more answers
Use the geometric mean to find the 7th term in a geometric sequence if the 6th term is 12 and the 8th term is 27. 20 19.5 18 17
Lesechka [4]
A₆ =12

a₇ = ?? = x

a₈ 27

In this case x is the geometric mean & as per the formula
geometric mean of 2 numbers =√(a₆ * a₈) = √(12*27)
& x=18.
Proof:
Find the common ratio between a₇ & a₆ ==> = ( x) / 12
now find the common ration between a₈ & a₇ ===> =27 / (x)
x/12 = 27/x ===> x² = 12*27 ==> x² = 324 & x =√324 = 18
7 0
3 years ago
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