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-BARSIC- [3]
4 years ago
14

The second term in a geometric sequence is 20. The fourth term in the same sequence is 45/4, or 11.25. What is the common ratio

in this sequence?
Mathematics
2 answers:
Dmitry [639]4 years ago
6 0

Answer:

0.75

Step-by-step explanation:

Elanso [62]4 years ago
5 0
We use equations for geometric sequence. We do as follows:<span>

a(n) = a(1) r^(n-1)
20 = ar^(2-1)
</span>20 = ar<span>
a = 20/r

11.25= ar^(4-1)
</span>11.25 = ar^3
<span>11.25 = (20/r)r^3
r = 0.75

Hope this answers the question. Have a nice day.</span>
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I think it’s 393.75 But not Sure can anyone confirm ? Or share the right answer
Naya [18.7K]

Answer:

$415.63

Step-by-step explanation:

it would have been 393.75, but he worked 5 hours overtime and got paid time and a half for it, meaning his normal pay plus half of it. (only for overtime tho).

so first calculate his normal pay:

40 × 8.75 = 350

then add overtime to it

8.75 × 5 = 43.75

43.75 × 1.5 = 65.625

65.625 + 350 = 415.625

round that and its 415.63!

5 0
3 years ago
Factorisation of ax^2 + bx + c
tigry1 [53]

Answer:

-5(t+3)(t-6)

Step-by-step explanation:

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3 years ago
Single-tickets sell for $20 each and a couple-tickets for $35 each. A total of 160 tickets are
Alex

Answer:

100 of the 20$ tickets, and 60 of the 35$ tickets

Step-by-step explanation:

20*x + 35*y = 4100

x + y = 160

That means x = 160 - y, put this into the first equation

20(160 - y) + 35y = 4100

3200 - 20y + 35y = 4100

15y + 3200 = 4100

15y = 900

y = 60

Put y = 60 into the second equation and

x + 60 = 160

x = 100

y = 60, x = 100

Double check that this works for both equations to make sure its right

20 * 100 + 35 * 60= 4100

2000 + 2100 = 4100 /Correct

100 + 60 = 160 /Correct

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