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nlexa [21]
3 years ago
8

7+5+3+... + (-287) =

Mathematics
2 answers:
romanna [79]3 years ago
8 0

Answer:

-302

Step-by-step explanation:

statuscvo [17]3 years ago
8 0
The answer is should be -302
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Given: △ABC; AB=BC, m∠BDA = 60°, BD=4 cm, BD ⊥ BA . Find: DC, AC.
vekshin1

Answer:

DC = 10.93 cm ,  AC = 9.8 cm

Step-by-step explanation:

From trigonometry;

⇒ Tan 60 = AB/BD

⇒AB = BD Tan 60 ( where BD = 4 cm )

⇒ AB = 6.93 cm

Also, AB=BC , therefore;

⇒ BC = 6.93 cm

⇒ Cos 60 = BD/AD

⇒ AD = BD/ Cos 60 = 4/Cos 60

⇒ AD = 8 cm

From Pythagoras theorem;

⇒ AC^{2} = AB^{2} + BC^{2} = (6.93)^{2} + (6.93)^{2}

⇒ AC = \sqrt{96.05} = 9.80 cm

⇒ DC = BD + BC = 4 + 6.93

⇒ DC = 10.93 cm

8 0
3 years ago
Write the first trigonometric function in terms of the second for θ in the given quadrant.
Vinvika [58]
Sintheta,costheta,tantheta are only positive in quadrant 1
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tantheta is only positive in quad3
costheta is only positive in quad4
8 0
4 years ago
Darren wins a coupon for 4$ off the lunch special for each of 5 days. He pays $75 for his 5 lunch specials. Write and solve an e
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P - (4x5) = 75
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4 0
3 years ago
Is 2x+3y=6 a Liner, Quadratic, or Exponential Equation. Why.
devlian [24]

Answer:

linear since there is a constant rate of change

Step-by-step explanation:

2x+3y=6

is simplified to 3y=-2x+6 which is divided by 2 to give us y=-2/3+2

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4 years ago
The number of popcorns sold at a movie theatre was 8 less than three times the number hotdogs. How many hotdogs did the theatre
serg [7]

Answer:

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Step-by-step explanation:

If the theater sold 8 more popcorns, the total would be 600, and it would be exactly 3 times the number of hotdogs. The theater sold 1/3 of 600, or 200 hotdogs.

6 0
3 years ago
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