3 years ago

A toy store's percent of markup is 40%.A model train costs the store $90. Find the markup

Mathematics

1 answer:

slavikrds [6]3 years ago

8 0

All you have to do is find 40% or .4 of 90.

90 x .4 = 36

36$ is the mark up, so the total price would be 126$.

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An entrepreneur estimates his total profit (total revenue minus total cost) for his proposed company as p(x) = x3 − 4x2 + 5x − 2

nikitadnepr [17]

To "break even" means that the costs are equal to the money made, so profit would have to be 0. Therefore, we can rewrite the equation to be
0 = x3 -4x2 +5x -20

From here, all you have to do is factor to be able to solve for the values of x

First, since the first two numbers both have an x2, we can factor that out
x2(x-4) + 5x -20 = 0

The next two can factor out a 5
x2(x-4) + 5(x-4) =0

Since both of these terms share an (x-4), they can be factored to become:
(x-4) (x2 +5) = 0

So now we just solve for x, and get x = 4, and +- (sqrt) 5i

Since 4 is the only answer present in the options (and since 5i is a non-real number), the answer would be 4

ANS: D

Hope this helped ^-^

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3 years ago

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A laboratory technician needs to make a 40-liter batch of a 40% acid solution. how can the laboratory technician combine a batch

Kobotan [32]

You need to do is 40 times 40%

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3 years ago

Multiply. express your anwser in simplist form.. 1 7\8 × 2 1\3

Vera_Pavlovna [14]

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If not simplified 35/8 if simplified 4 and 3/8.