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sesenic [268]
3 years ago
15

A clothing store donated a percent of every sale to hospitals. The total sales were $7,750 so the

Mathematics
1 answer:
Flauer [41]3 years ago
6 0

Answer:

4%

Step-by-step explanation:

310 /7759 x 100% = 4%

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Paul is two years younger than Patricia. Daniel is 25% older than Patricia. Ten years ago, Daniel was 50% older than Patricia. H
Sergeeva-Olga [200]

We have 3 people: Paul, Daniel and Patricia. Let each name denote that person’s current age in years. Remember that % is the symbol for 1/100.


PAUL: (#A) Paul = Patricia – 2
DANIEL: 
(#B) Daniel = 125% * Patricia = 125 * (1/100) * Patricia = 1.25 * Patricia
(#C) Ten years ago, Daniel’s age at that time would have been Daniel’s current age – 10. IE “Daniel – 10”.
Ten years ago, Patricia’s age at that time would have been Patricia’s current age – 10. IE “Patricia – 10”. 
Ten years ago, Daniel’s age at that time (IE Daniel – 10) was 50% greater than Patricia’s age at the time (Patricia – 10). 
IE 

Daniel – 10 = 150% * (Patricia – 10)
Daniel – 10 = 1.50 * (Patricia – 10)
Daniel – 10 = 1.50 * Patricia – 1.50 * 10
Daniel – 10 = 1.50 * Patricia – 15
Daniel = 1.50 * Patricia – 15 + 10
Daniel = 1.50 * Patricia – 5


So now we have 3 equations in 3 unknowns:
(A) Paul = Patricia – 2
(B) Daniel = 1.25 * Patricia
(C) Daniel = 1.50 * Patricia – 5


Solve equations B & C simultaneously
 1.25 * Patricia = 1.50 * Patricia – 5
 1.25 * Patricia – 1.50 * Patricia = – 5
– 0.25 * Patricia = – 5
 Patricia = (– 5) / (– 0.25) 
Patricia = + 20

So now we can write the 3 people’s ages:
(a) Patricia = 20
(b) Paul = Patricia – 2 = 20 – 2 = 18
(c) Daniel = 1.25 * Patricia = 1.25 * 20 = 25

<span>
</span>

<span>Finally, we check our solution against the original question. </span>
Paul is two years younger than Patricia. ……… 20 – 2 = 18 ✔
Daniel is 25% older than Patricia. ……… 25 = 125% * 20 ✔
Ten years ago, Daniel was 50% older than Patricia. 25 – 10 = 150% (20– 10) ✔


Hope that helped :)

5 0
3 years ago
Please Please Please help me
mrs_skeptik [129]

Answer:

18 \sqrt{5\\}

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
What is 6 1/3 - 2 1/5
Semmy [17]

Answer:

4 2/15

Step-by-step explanation:

okay so let's first change 1/3 and 1/5 into the same fraction,

the common denominator, is 15

3 times 5, to get to fifteen,

so

5/15 and 3/15

minus eachother

2/15

6-2 is 4

4 2/15

7 0
3 years ago
The minimum wage is increased by 1.7%. It was originally £6.10. How much is the minimum wage now?
Rus_ich [418]
It would be 7.80 , just add 6.10 +1.7 hope this helps
7 0
3 years ago
What is the greatest common factor of 8 and 9
ExtremeBDS [4]

I believe the answer is 1. One is the only number that can go into both 8 and 9.

3 0
2 years ago
Read 2 more answers
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