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JulsSmile [24]
3 years ago
7

45 cents is what percentage of $10?​

Mathematics
1 answer:
Arada [10]3 years ago
7 0

Answer:

4.5%

Step-by-step explanation:

Converting Dollars to cents we get,

$10=1000 cents

plz mark as brainliest

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How much water should we add to 20 kg of seawater to change its concentration from 3% to 2%?
zhannawk [14.2K]

Answer:

10 kg

Step-by-step explanation:

In 3% concentration of 20 kg of seawater, there will be \frac{20 \times 3}{100} = 0.6 kg of salt.

So, if it is a 2% solution of seawater,

Then 2 kg salt will be there in 100 kg solution.

So, 0.6 kg salt will be there in \frac{100 \times 0.6}{2}= 30 kg of solution.

So, to make a solution from 3% to 2% we have to add (30 - 20) = 10 kg of water with a 20 kg solution. (Answer)

6 0
3 years ago
Clara simplifies (8b-4r)-(2b-r) and says the result is 6b-5r. What error did Clara make?
Mariulka [41]
Clara forgot to distribute the - sign to- (2b-r) through  all the terms  the answer would be 6b+3r
7 0
3 years ago
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Factor the following polynomial completely.<br><br>y squared plus 5 zy plus 4 z squared<br><br>​
sweet [91]

Answer:

(y + z)(y + 4z)

Step-by-step explanation:

{y}^{2}  + 5zy + 4 {z}^{2}  \\  =  {y}^{2} + zy + 4zy + 4 {z}^{2}  \\  = y(y + z) + 4z(y  + z) \\  = (y + z)(y + 4z)

7 0
4 years ago
Emma is buying e number of tomato plants, and Frank is buying f number of tomato plants. Each plant costs $7. Emma is
ehidna [41]

Answer:

( 7e + f ) - 25 = total

Step-by-step explanation:

(Emma + Frank) - Coupon = TOTAL

( 7e. + f ) - 25 = TOTAL

3 0
2 years ago
Answer pls I would really appreciate your help
tester [92]

Answer:

I think A

Step-by-step explanation:

srry if wrong

i hope this helps tho

3 0
3 years ago
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