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Nady [450]
3 years ago
11

If the original pair of a pair of shoes is $80 but a sign above the shoes reads “ Sale - 20% discount”, then what price would a

customer pay for the shoes (excluding tax)?
A. 64
B. 80
C. 60
D. 16
E. 6
Mathematics
1 answer:
solong [7]3 years ago
6 0

Answer:

A. 64

Step-by-step explanation:

The shoes are 80 dollars.  We get a 20% discount

Discount = 80*20%

                = 80*.20

                  =16

The sales price = original price less the discount

                          = 80 -16

                           = 64

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An arithmetic sequence has this recursive formula: (a^1 =8, a^n= a^n-1 -6
eduard

Answer:

a_n = 8 + (n - 1) (-6)

Step-by-step explanation:

Given

a_1 = 8

Recursive: a_{n} = a_{n-1} - 6

Required

Determine the formula

Substitute 2 for n to determine a_2

a_{2} = a_{2-1} - 6

a_{2} = a_{1} - 6

Substitute a_1 = 8

a_2 = 8 - 6

a_2 = 2

Next is to determine the common difference, d;

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d = -6

The nth term of an arithmetic sequence is calculated as

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Substitute a_1 = 8 and d = -6

a_n = a_1 + (n - 1)d

a_n = 8 + (n - 1) (-6)

Hence, the nth term of the sequence can be calculated usinga_n = 8 + (n - 1) (-6)

3 0
3 years ago
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