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Ber [7]
2 years ago
14

Answer all questions please :)

Mathematics
2 answers:
krok68 [10]2 years ago
7 0
1. Is 2ba 2. Is 6.4n^2 3. 24k - 6
Pachacha [2.7K]2 years ago
4 0
1 is 2ab 2 is 8.4n and 3 is 24k-6
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the sum of the first six terms of a geometric series is 21/16 . if the common ratio is -1/2 , what is the first term?
Oksanka [162]

Answer:

-84

Step-by-step explanation:

The formula for the nth term of a geometric progression is

Un = ar^n- 1

The sum of the first six terms of a geometric series (U6) = 21/16

Common ratio = -1/2 ,

a = First term ??

21/16 = a × (-1/2 )^6- 1

21/16 = a ×(-2^-1)^5

21/16 = a × -2^-6

Cross Multiply

16 × a × -2^-6 = 21

a = 21/16 × -2^-6

a = 21/16 ×- 1/2⁶

a = 21/16 × -1/64

a = 21 ÷(-1/4)

a = 21 × -4

a = -84

The first term = 84

8 0
2 years ago
What is 0.3% of 200<br>​
allsm [11]
It’s 60 because you multiple .3 by 200
7 0
2 years ago
Esther's company has been contracted to lay carpet in a room at a new observatory. The floor plan for the room is in the shape o
timofeeve [1]

Answer:

  • 3960 ft²

Step-by-step explanation:

The pentagon has been split into 5 congruent triangles.

<u>Each triangle has area of:</u>

  • 1/2*48*\sqrt{40.8^2 - (48/2)^2} = 24*\sqrt{1088.64} = 24*33 = 792 ft²

<u>The area of the room is:</u>

  • 792*5 = 3960 ft²

5 0
2 years ago
Makenzie leaves her home at 10am. She has to be at her grandmother's house, which is 42 miles away. The
mestny [16]

Answer:

no

Step-by-step explanation:

will take approximately 1-2 hours or even longer

7 0
3 years ago
Can anyone help me? pt.1
dlinn [17]

Answer:

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or si quema cuhhhhhh cuhhhhhhhh ok

8 0
3 years ago
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