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lapo4ka [179]
3 years ago
14

Please help. Trig: Laws of Cosines

Mathematics
1 answer:
ladessa [460]3 years ago
8 0

Answer:

16.2 units

Step-by-step explanation:

Greater angle: 180 - 72 = 108

D² = 10² + 10² - 2(10)(10)cos(108)

D² = 261.8033989

D = 16.18033989

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What is the value of ​2×[34−5×(3+1)]​ ?
spayn [35]

Answer:

\boxed{ \bold{ \huge{ \boxed{ \sf{28}}}}}

Step-by-step explanation:

Use BODMAS rule :

Bracket , Of , Division , Multiplication , Addition , Subtraction

\sf{2 \times [ 34 - 5 \times (3 + 1) ] }

Add the numbers : 3 and 1

\dashrightarrow{ \sf{2 \times [ 34 - 5 \times 4 ] }}

Multiply the numbers : 5 and 4

\dashrightarrow{ \sf{2 \times [ 34  - 20 \: ]  }}

Subtract 20 from 34

\dashrightarrow{ \sf{2 \times 14}}

Multiply the numbers : 2 and 14

\dashrightarrow{ \sf{28}}

Hope I helped!

Best regards! :D

4 0
3 years ago
Katrina owns a 9-acre farm. Last month, she bought her neighbor’s adjoining 8-acre farm. How large is Katrina’s farm now?
blondinia [14]

Answer:

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Step-by-step explanation:

9 acres + 8 acres = 17 acres, if that wasn't what the question meant please let me know and I'll change the answer or try to help clear confusion.

3 0
2 years ago
Draw pictures to show two ways to buy 276 markers
irakobra [83]
100 circles and another 100 circles and 76 circles.


Draw in real life it will work.


Another way 2 hundreds 7 tens and 6 ones
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2 years ago
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An office is 20 feet long, 15 feet wide, and 12 feet high. it costs about 9 cents per year to air condition one cubic foot of sp
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27$ because you do 20*15*12 then 3600*0.09 and divide that answer by 12 which is 27
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2 years ago
Graph the linear equation to find three points that solve the equation then plot on the graph negative -x -4y =-18​
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X
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