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Fudgin [204]
3 years ago
9

during a sale mohamed discounted all shirts in his store by a certain percent . if the shirts normally priced at $15 were marked

down to $12 , what would be the marked-down price of a shirt normally priced at $20 ?
Mathematics
1 answer:
dlinn [17]3 years ago
8 0
To start, we need to find the percent decrease of the $15 shirt. The price decreases by 3 dollars, from the original $15. 3 is 1/5 of 15 so the shirt was discounted 1/5, or 20%. Next, we need to discount the $20 shirt by the same amount. 20% is equal to one fifth, so just take off one fifth of the $20 for the shirt. 1/5 of 20 is four, so 20-4= 16. The $20 shirt would now cost $16.
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3 years ago
How do find the median and range..?<br><br> give examples!
swat32

Answer:

Count how many numbers you have. If you have an odd number, divide by 2 and round up to get the position of the median number. If you have an even number, divide by 2. Go to the number in that position and average it with the number in the next higher position to get the median.

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Step-by-step explanation:

hope this helped!

7 0
3 years ago
Read 2 more answers
A jar has 15 marbles: 4 are green, 6 are red, and 5 are yellow. What is the probability that we will get a red marble or the gre
Crank

2/3

There are 4 green marbles and 6 red marbles, making 10 green or red marbles.  The probability of drawing a red or a green marble is then 10/15 total marbles, which can be simplified to 2/3 by dividing the numerator and denominator each by 5.

5 0
3 years ago
How can i evaluate this expression 3/2-4/7
siniylev [52]
\frac{3}{2} -  \frac{4}{7}
=  \frac{3}{2} +  \frac{-4}{7} &#10;
=  \frac{21}{14} +  \frac{-8}{14}
=  \frac{21+-8}{14}
= \frac{13}{14}
<span>Decimal: 0.928571</span>
4 0
4 years ago
Read 2 more answers
a girl wants to count the steps of a moving escalator which is going up. if she is going up on it, she counts 60 steps. if she i
Leto [7]

Let

x--------> the speed of the girl in step

y--------> the speed of the escalator in step

d------> the distance between ground and floor.

we know that

speed=\frac{distance}{time} \\ \\ time=\frac{distance}{speed}

when the girl is going up on escalator

x-y=\frac{d}{60} ----> equation 1

when the girl is going down on escalator

x+y=\frac{d}{90} -------> equation 2

Adds equation 1 and equation 2

2x=\frac{d}{60} +\frac{d}{90} \\ \\ 2x=\frac{5}{180} d

x=\frac{5}{360}d --------> equation 3

Time to climb (in step) with y=0 (escalator standing still)

x*t=d\\\\ t=\frac{d}{x} -----> equation 4

Substitute equation 3 in equation 4

t=\frac{d}{\frac{5d}{360}}  \\ \\ t=\frac{360}{5} \\ \\ t=72 steps

therefore

the answer is

72 steps

5 0
3 years ago
Read 2 more answers
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