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ra1l [238]
4 years ago
8

ND

Mathematics
1 answer:
Korvikt [17]4 years ago
5 0

Step-by-step explanation:

As you have done till

3p + 8 = 20

3p = 20 - 8

3p = 12

p = 12 / 3 = 4

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Micah is twice as old as Richard. Richard is four times as old as Ken. Ken is six years old. How old is Micah?
stich3 [128]

Let Micah = m, Richard = r, Ken = k

k = 6, r = 4k, m = 2r

First, plug in 6 for k

r = 4(k) = 4(6) = 24

Next, plug in 24 for r.

m = 2(r) = 2(24) = 48

Micah is 48 years old.

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=5.5*4

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3 years ago
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6 0
3 years ago
The selling price of an item is $ 650 it is marked down by 10% , but this sale price is still marked up from the cost of $ 450.
Tanzania [10]

Answer: 30% or $ 135.


Explanation


The mark up is generally expressed as a percentage. It is the percent increase on the cost.


We can calculate the mark up from cost to sale price of the item as a composition of steps. That is what the next steps show.


1) First step: calculate the the price after the item is marked down by 10%:

Selling price: $ 650

Mark down = 10% of 650 = 0.10 × $ 650 = $65

Price after mark down: $ 650 - $ 65 = $ 585.


2) Second step: difference of the price marked down to the cost:

$ 585 - $ 450 = $ 135


3) Calculate the percent mark up:

% mark up = (mark up / cost) × 100 = ($ 135 / $ 450) × 100 = 30%

4 0
3 years ago
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