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EastWind [94]
3 years ago
15

What is the nth term of the arithmetic sequence 7,5,3,1?

Mathematics
1 answer:
Minchanka [31]3 years ago
3 0

Answer:

tn = 7 + (n - 1)*(-2) or

tn = 9 - 2n

Step-by-step explanation:

You are (beginning with 7) subtracting 2 from the term to the left.

a = 7

d = -2

tn = a1 + (n - 1)*d

tn = 7 + (n - 1)*(-2)

Try this out on n = 4

t4 = 7 + (4 - 1)*-2

t4 = 7 +  (3) (-2)

t4 = 7 - 6

t4 = 1 just as it says.

More generally

tn = 7 + (n - 1)*-2

tn = 7 + (-2n) + 2

tn = 9 - 2n

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Dear god help me I NEED this answer!!
tatiyna

Answer:

<em>Correct choices: a) 5:12 and c) 7 to 12</em>

Step-by-step explanation:

The ratio of red beads to pink beads is 5:7. This means that for every 5 red beads there are 7 pink beads.

It also means that for every 12 beads there are 5 red beads and 7 pink beads.

Therefore, there are two part-to-whole ratios:

5:12 red beans to total beads, and

7:12 pink beans to total beads

Correct choices: a) 5:12 and c) 7 to 12

5 0
3 years ago
In a survey four out of every five people prefer creamy more then crunchy peanut butter. If there are 120 people at the grocery
JulsSmile [24]

Answer:

150

Step-by-step explanation:

set up a equation-

4/5=120/x

x= people buying peanut butter.

120/4=30

30 x 5=150

3 0
3 years ago
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kati45 [8]

Answer:

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Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Select all values of x that make the inequality −x+6≥10 true.
hichkok12 [17]
This is because the 6 is dropping value due to the denomter of so there it is -3.9
7 0
3 years ago
What is the compounded interest after 3 years if you invest $10 000 and earn an interest rate of 5% per year?
denis23 [38]

Compound Interest is the interest that is <em>compounded on a particular sum of money or investment over a given period of time.</em>

  • The interest for the first year is $1,576.25
  • The sum of money after adding the original to the interest is $11,576.25
  • The interest on the new total is $13,400.96

  • Step 1: Find the interest for the first year.

The formula is given as:

A = P(1 + r/n)^nt

P = Principal = $10,000

R = Rate = 5%

n = 1

t = 1

First, convert R as a percent to r as a decimal

r = R/100

r = 5/100

r = 0.05 rate per year,

Then solve the equation for A

A = P(1 + r/n)^nt

A = 10,000(1 + 0.05/1)^(1)(3)

A = 10,000.00(1 + 0.05)^(3)

A = $11,576.25

I = A - P

Hence:

I = $11,576.25 - $10,000.00

I (interest) = $1,576.25

  • Step 2: Add the interest to the original amount.

$10,000 +  $1,576.25

= $11,576.25

  • Step 3: Determine interest in the new total

The formula is given as:

A = P(1 + r/n)^nt

P = Principal = $11,576.25

r = 0.05 rate per year,

Then solve the equation for A

A = P(1 + r/n)^nt

A = 11,576.25(1 + 0.05/1)^(1)(3)

A = 11,576.25(1 + 0.05)^(3)

A = $13,400.96

Therefore,

  • The interest for the first year is $1,576.25
  • The sum of money after adding the original to the interest is $11,576.25
  • The interest on the new total is $13,400.96

To learn more, visit the link below:

brainly.com/question/16020930

5 0
3 years ago
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