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Nady [450]
3 years ago
11

What is the 8th term if your first four are 3,7,11,15

Mathematics
2 answers:
skelet666 [1.2K]3 years ago
8 0

Answer:

it's answer is 31.

Step-by-step explanation:

t1 = 3 = 4* 1 - 1

t2 = 7 = 4* 2 - 1

t3 = 11 = 4 * 3 - 1

t4 = 15 = 4* 4 - 1

----------------------

Tn = 4n -1

so the 8th term is

t8 = 4 * 8 - 1 = 31

amid [387]3 years ago
6 0
3,7,11,15,19,23,27,31

32 = 8th term.
The common difference is +4
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Eva8 [605]

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               ii) 17 - 3x²

             iii) - 20 + 10x² - x⁴

<u>Step-by-step explanation:</u>

g(x) = 3x + 2       h(x) = 5 - x²

i) h(g(x))

  h(3x + 2) = 5 - (3x + 2)²

                  = 5 - (9x² + 12x + 4)

                  = 5 - 9x² - 12x - 4

                  = 1 - 9x² - 12x

ii) g(h(x))

   g(5 - x²) = 3(5 - x²) + 2

                 = 15 - 3x² + 2

                 = 17 - 3x²

iii) h(h(x))

   h(5 - x²) = 5 - (5 - x²)²

                 = 5 - (25 - 10x² + x⁴)

                 = 5 - 25 + 10x² - x⁴

                 = -20 + 10x² - x⁴

4 0
3 years ago
There are 10 rolls of film in a box and 3 are defective. two rolls are selected without replacement. what is the probability of
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Second method using combination:
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3 years ago
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Step-by-step explanation:  

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1 mile in feet = 5280 + 40.8 = <u> 5320.8 feet </u>

1 mile in inches  = 63360

40.8 feet in inches = 964.8

63360 + 964.8 = <u>64324.8 inches </u>

<u>hope this helps :) </u>



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