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777dan777 [17]
3 years ago
9

HELP ASAP !! easy question and i’ll give brainliest

Mathematics
2 answers:
tia_tia [17]3 years ago
4 0

Answer:

x=38.5

Step-by-step explanation:

\sqrt{23^{2}- 18^{2}}   =\sqrt{205}

cos(x)=\frac{18^{2} +23^{2} -205}{2(18)(23)}

x=38.5(correct to the nearest tenth)

Elanso [62]3 years ago
3 0
38.5 I believe is the answer
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7 0
3 years ago
List all x intercepts for y= -cos(1/2x + 1/5 pi) on the interval [-2/5pi,4pi]
Dahasolnce [82]
- cos ( 1/2 x + 1/5 π ) = 0 ( and because if cos α = 0, α= π/2 + k π, k ∈ Z )
1/2 x + π/5 = π/2 + k π,    k ∈ Z
1/2 x = π/2 - π/5 + k π  / * 2
x = π - 2π/5 + 2 k π
x = 3/5 π + 2 k π = 0.6 π + 2 k π
Answer:
If k = 0:  x 1 = 0.6 π = 3π/5
k = 1 : x 2 = 2.6 π = 13π/5
3 0
3 years ago
Read 2 more answers
How solve step by step -5р - 9 + 8р = 36
Yuki888 [10]

Answer:

-5p-9+8p=36

-5p+8p=36+9

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p=15

6 0
3 years ago
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R0-180(x, y) maps to the same point as 80,180(x, y).<br> True<br> False
mariarad [96]
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6 0
3 years ago
What is the sum? <br> Thank you!
timurjin [86]

Answer:

50 is the sum

Step-by-step explanation:

-10+20=10

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5 0
3 years ago
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