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IRINA_888 [86]
3 years ago
15

6+3×(13−2)−5^2 whoever answers first will get branliest and will get 50 points

Mathematics
1 answer:
KiRa [710]3 years ago
8 0

Answer:

14

Step-by-step explanation:

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Find S18 for geometric series given a5=-6 and a2= -48
Ganezh [65]

an = a1r^(n-1)

a5 = a1 r^(5-1)

-6 =a1 r^4


a2 = a1 r^(2-1)

-48 = a1 r


divide

-6 =a1 r^4

----------------    yields   1/8 = r^3      take the cube root  or each side

-48 = a1 r                     1/2 = r


an = a1r^(n-1)

an = a1 (1/2)^ (n-1)

-48 = a1 (1/2) ^1

divide by 1/2

-96 = a1


an = -96 (1/2)^ (n-1)


the sum

Sn = a1[(r^n - 1/(r - 1)]

S18 = -96 [( (1/2) ^17 -1/ (1/2 -1)]

       =-96 [ (1/2) ^ 17 -1 /-1/2]

      = 192 * [-131071/131072]

 approximately -192

     

       

     

3 0
3 years ago
When your class visited the aquarium, the costs totaled the maximum
yanalaym [24]

Answer:

I think it's A

Step-by-step explanation:

Please correct me if I'm wrong

7 0
3 years ago
Please help me. I need to find the names for AB, DA, BC, OA, and
Goshia [24]

Answer:

AB - Diameter

DA - Tangent

BC - Chord

OA - Radius

CAB - Inscribed Angle

8 0
2 years ago
Why is the greatest common factor one?
lubasha [3.4K]

because one times every number is the same

8 0
3 years ago
Find the Unit rate for thirty textbooks weigh 144 pounds
Charra [1.4K]
If 30 textbooks weigh 144, you do 144/30 to calculate each unit
So the answer is 4.8
8 0
3 years ago
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