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OverLord2011 [107]
3 years ago
7

after a 20% discount , the price of a super slick skateboard is $140 what was the price before the discount

Mathematics
2 answers:
Juliette [100K]3 years ago
4 0
A good way to set up percentage problems is by using "Part = Percent × Whole".
In this case, our part is 140, our percent is 80 (because that 20% wa s took of from the original 100%), and our whole is unknown. If we fill in the equation we get this:
140=80×x.
if we solve the equation by dividing both sides by 80, we get $1.75=x. Because we replaced 80% with 80,we have to divide by 100 since we multiplied by 100 in the beginning. So, we get that $175 was the original price.
Ymorist [56]3 years ago
4 0

Answer:

$175

Step-by-step explanation:

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If f(x) is a linear function ,f(-1)=-3 , and f(4)=-5 , find an equation for f(x)
rosijanka [135]

Answer:

<h2>         f(x) = -²/₅ x - ¹⁷/₅</h2>

Step-by-step explanation:

The equation of the linear function: f(x) = mx + b

f(-1) = -3   ⇒   -3 = m(-1) + b  ⇒   m = b + 3

f(4)=-5   ⇒   -5 = m×4 + b  

                   -5 = 4(b+3) + b

                   -5 = 4b + 12 + b

                    5b = -5 - 12

                      b = -¹⁷/₅

m = -¹⁷/₅ + 3 = -¹⁷/₅ + ¹⁵/₅ = -²/₅

Therefore the function:

<h3>                                     f(x) = -²/₅ x - ¹⁷/₅</h3>
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3 years ago
Find the area of a rectangular measuring 25 feet long by 8 feet wide. Show your work
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Step-by-step explanation:

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3 years ago
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If 96 people attend a concert and tickets for adults cost $3.75 while tickets for children cost $3.50 and total receipts for the
sergejj [24]

Answer: 58 adults and 38 children went to the concert.

Step-by-step explanation:

Let x= adults , y= children

As per given ,

x+y = 96  (i)

3.75x+3.50y = 350.50     (ii)

Multiply 3.75 to (i) , we get

3.75 x + 3.75y  = 360  (iii)

Eliminate (ii) from (iii)

3.75 y-3.50y= 360-350.50\\\\\Rightarrow\ 0.25y= 9.5\\\\\Rightarrow\ y=\dfrac{9.5}{0.25}\\\\\Rightarrow\ y= 38

put this in (i) ,  x+38 = 96

x= 96-38 = 58

So, 58 adults and 38 children went to the concert.

4 0
3 years ago
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