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aivan3 [116]
3 years ago
12

Find the 7th term of the arithmetic sequence 4x + 5, 11x + 9,18x + 13, ...

Mathematics
1 answer:
Svet_ta [14]3 years ago
5 0

Step-by-step explanation:

we see the common difference is

a2-a1 = 11x + 9 - 4x - 5 = 7x + 4

an = an-1 + (7x+4) = a1 + (n-1)×(7x+4)

for a7 we have then

a7 = 4x + 5 + 6×(7x +4) = 4x + 5 + 42x + 24 = 46x + 29

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A florist needs several pieces of ribbon that are 5 and 1/2 inches long if she begins with a piece of ribbon that is 264 inches
dimaraw [331]

Answer:

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Step-by-step explanation:

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Division is the usual shortcut for repeated subtraction. You could subtract 5.5 from 264 until you get to zero. You would have to do 48 subtractions. It is easier to divide 264 by 5.5 to see how many times it goes.

8 0
3 years ago
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cluponka [151]

Answer:

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Step-by-step explanation:

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3 0
3 years ago
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Crazy boy [7]
9 cm
Explanation:
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7 0
3 years ago
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mr Goodwill [35]

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