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m_a_m_a [10]
3 years ago
13

Help please !! Solve -1.6r+5= -7.8

Mathematics
2 answers:
Nikolay [14]3 years ago
5 0

subtract 5 from both sides. -1.6r=-5 divide both sides by-1.6. r=-5/-1.6 simp;ify-5/1.6 to 3.125. r =3.125

jonny [76]3 years ago
3 0

Answer: r=8

Step-by-step explanation: -1.6r+5=-7.8

-16/10r+5=-78/10

-2^4/2.5r+5= -2X3X13/5

-2^3/5r+5= - 3X13/5

(-8r)+25/5=-3X13/5

=8 so r=8

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balu736 [363]
Four halves equals 2.
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3 years ago
Read 2 more answers
Calculate the a) future value of the annuity due, and b) total interest earned. (From Example 2)
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.

3 0
2 years ago
If you can’t see the answer choices , they are <br> A. 9<br> B. 8 <br> C. 10 <br> D. 12
ANTONII [103]

Answer:a)9

I think

Step-by-step explanation:

6 0
2 years ago
Would I have to add all of them or multiply I can’t remember how to do it nor if I actually learned this.
nirvana33 [79]

Answer:

Multiply Length times Width times Height.

Step-by-step explanation:

sq root 24 x sq root 18 x sq root 8 = 58.78

5 0
3 years ago
Not sure how to complete #14
pashok25 [27]
14. Add the line times the outside number
X(X+4)= (2√3)^2
X^2+4X= 4√9
X^2+4X= 4times 3
X^2+4X=12
X^2+4X-12=0
(X+6)(X-2)=0
X=-6 X=2
Answe can't be negative so it's X=2
3 0
2 years ago
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