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IrinaVladis [17]
3 years ago
5

A scalene triangle is obtuse. Determine if the statement is always, sometimes, or never true.

Mathematics
1 answer:
valentina_108 [34]3 years ago
4 0

Answer:

sometimes

Step-by-step explanation:

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Find the fifth roots of 243(cos 240° + i sin 240°).
Mazyrski [523]

Answer:

See below.

Step-by-step explanation:

Fifth root of 243 = 3,

Suppose r( cos Ф + i sinФ) is the fifth root of 243(cos 240 + i sin 240),

then r^5( cos  Ф  + i sin  Ф )^5 = 243(cos 240 + i sin 240).

Equating equal parts and using de Moivre's theorem:

r^5 =243  and  cos  5Ф  + i sin  5Ф = cos 240 + i sin 240

r = 3 and  5Ф = 240 +360p so Ф =  48 + 72p

So Ф = 48, 120, 192, 264, 336  for   48 ≤ Ф < 360

So there are 5 distinct solutions given by:

3(cos 48 + i sin 48),

3(cos 120 + i sin 120),

3(cos 192 + i sin 192),

3(cos 264 + i sin 264),

3(cos 336 + i sin 336).. (Answer).

7 0
3 years ago
Jason works for a car dealer and his commission for selling a car is 2% of the selling price. Jason sold two cars last month for
ASHA 777 [7]

Answer:

$2600

Step-by-step explanation:

2/100×70000=1400

2/100×60000=1200

1400+1200=2600

5 0
3 years ago
Dave rented a limousine for his wife's birthday. The hourly rate is $60. They used the limousine for 4 hours, plus Dave gave the
11Alexandr11 [23.1K]
SO heres what you have to do: 
Hourly Spent: 60 x 4 = 240 
0.10 x 240= 24
24+240=264
$264 is your answer!
Hope this helped!!! ;) 

8 0
3 years ago
Read 2 more answers
The second term from the end of the A.P. 5.8. 11,......47 is
enyata [817]
D = -(8-5) = -3
a = 47
an = a + (n-1)d = 47 + (-3) = 47 - 3 = 44
7 0
3 years ago
KIA buys a shirt that cost $12.50 and some pairs of socks that are $2.50 each. She pays a total of $27.50. How many pairs of soc
Andru [333]
27.50-12.50=15
15/2.5=6
Six pairs
5 0
3 years ago
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