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Studentka2010 [4]
3 years ago
6

Eight is 5 less than twice the number r

Mathematics
2 answers:
Savatey [412]3 years ago
8 0

Answer:

r = 6.5

Step-by-step explanation:

Set up an equation:

  • "Eight is" means 8 equals
  • "5 less than" means minus 5
  • "twice the number r" means r times 2

Therefore, the equation is 8 = 2r - 5

Solve:

8 = 2r - 5

Add 5 on both sides:

8 = 2r - 5

+5      +5

13 = 2r

Divide by 2 on both sides:

13 = 2r

/2    /2

6.5 = r

Reptile [31]3 years ago
7 0
I think the answer is 1.5 but I’m not 100%sure
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vredina [299]

Answer:

  • value: $66,184.15
  • interest: $6,184.15

Step-by-step explanation:

The future value can be computed using the formula for an annuity due. It can also be found using any of a variety of calculators, apps, or spreadsheets.

__

<h3>formula</h3>

The formula for the value of an annuity due with payment P, interest rate r, compounded n times per year for t years is ...

  FV = P(1 +r/n)((1 +r/n)^(nt) -1)/(r/n)

  FV = 5000(1 +0.06/4)((1 +0.06/4)^(4·3) -1)/(0.06/4) ≈ 66,184.148

  FV ≈ 66,184.15

<h3>calculator</h3>

The attached calculator screenshot shows the same result. The calculator needs to have the begin/end flag set to "begin" for the annuity due calculation.

__

<h3>a) </h3>

The future value of the annuity due is $66,184.15.

<h3>b)</h3>

The total interest earned is the difference between the total of deposits and the future value:

  $66,184.15 -(12)(5000) = 6,184.15

A total of $6,184.15 in interest was earned by the annuity.

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