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Pachacha [2.7K]
3 years ago
6

Ruben bought a DVD recorder for 240 $. Now, it is on sale for 180 $. Find the percentage of change in the price

Mathematics
1 answer:
xenn [34]3 years ago
3 0

Answer:

Step-by-step explanation:

orginal :$240

new/sale: $180

Percentage of Change:

(V2−V1)|V1|×100

=(180−240)|240|×100

=−60240×100

=−0.25×100

=−25%change

=25%decrease

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Solve this quadratic equation. 6x^2 - 2x = 7
sweet-ann [11.9K]

The solutions to the equation are \frac{1 +/- \sqrt{43}}{6}.

You can find the answer to any quadratic by using the quadratic formula. The formula is below.

\frac{-b +/- \sqrt{b^{2}-4ac}}{2a}

Then find a (the number attached to x^2), b (the number attached to x) and c (the constant). This will allow you to plug in and solve.

\frac{2 +/- \sqrt{-2^{2}-4(6)(-7)}}{2(6)}

\frac{2 +/- \sqrt{4 + 168}}{12}

\frac{2 +/- \sqrt{172}}{12}

\frac{1 +/- \sqrt{43}}{6}

8 0
4 years ago
The principal amount, $4200, earns 3.6% interest compounded monthly.
svlad2 [7]

Answer:

a)

A\:=\:P\left(1\:+\:\frac{r}{n}\right)^{nt}

b)

The total amount accrued, principal plus interest,  from compound interest on an original principal of  $ 4,200.00 at a rate of 3.6% per year  compounded 12 times per year  over 10 years is $5667.28.

Step-by-step explanation:

a. Write the function that represents the value of the account at any time, t.

The function that represents the value of the account at any time, t

A\:=\:P\left(1\:+\:\frac{r}{n}\right)^{nt}

where

P represents the principal amount

r represents Annual Rate

n represents the number of compounding periods per unit t, at the end of each period

t represents the time Involve

b) What will the value be after 10 years?

Given

The principal amount  P = $4200

Annual Rate r = 3.6% = 3.6/100 = 0.036

Compounded monthly = n = 12

Time Period = t

To Determine:

The total amount A = ?

Using the formula

A\:=\:P\left(1\:+\:\frac{r}{n}\right)^{nt}

substituting the values

A\:=\:4200\left(1\:+\:\frac{0.003}{12}\right)^{\left(12\right)\left(10\right)}

\:A\:=\:4200\left(1.0025\right)^{120}

A=5667.28 $

Therefore, the total amount accrued, principal plus interest,  from compound interest on an original principal of  $ 4,200.00 at a rate of 3.6% per year  compounded 12 times per year  over 10 years is $5667.28.

6 0
3 years ago
What are 5 irrational numbers​
victus00 [196]

Answer:

square roots of:

2, 5, 3, 10, 15

6 0
3 years ago
Can anyone help me with this?
-Dominant- [34]
A=60
B=52
C=152
I’ve attached my work on how I got these answers
Hope this helps!

7 0
3 years ago
Read 2 more answers
How do you alive this using scientific notation?
Alexxx [7]
Im pretty sure its 15×10 to the -5 and if u wanted expanded its .00015
4 0
3 years ago
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