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LekaFEV [45]
3 years ago
13

How much pure acid should be mixed with 7 gallons of a 40% acid solution in order to get a 70% acid​ solution?

Mathematics
2 answers:
Fed [463]3 years ago
6 0

Answer:

Step-by-step explanation:

raketka [301]3 years ago
5 0
In this item, we are going to use the concepts of total mass balance and component mass balance. We let the amount of the pure acid be equal to x. 

Total mass balance:
   7 + x = 7 + x

Hence, the total amount of the resulting solution is 7 + x

Component mass balance,
   (1)(x) + (0.4)(7) = (0.7)(7 + x)

The value of x from the component mass balance is equal to 7.

<em>Answer: 7 gallons</em>
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The list price of a set of golf clubs is $399.99. If the series discount offered is 20/20/15, find the net cost after trade disc
Artemon [7]

Answer:

1,620/.60 = $2,700

step-by-step explanation:

Calculate the complement of the trade discount 100% - 40 = .60 •Calculate the list price $n Discount Rates EXAMPLE: The list price of the office equipment is $15,000. The chain discount is 20/15/10.Step 1. $15,000 X .20 =$3,000Step 2. $15,000-3,000=$12,000 X .15 = $1,800Step 3. $12,000-1,800 = $10,200 X.10 = $1,020Step 4. $10,000- 1,020 = 9,180 Net PriceCalculating Net Price Using Net Price Equivalent Rate EXAMPLE: The list price of office equipment is $15,000. The chain discount is 20/15/10. What is the net price? Step 1. Calculate each rates complement and convert to a decimal.100%-20 = 80% which is .8100%-15= 85% which is .85100% -10 = 90% which is .9Step 2. Calculate the net price equivalent rate. ( Do not round ).8 X .85 X .9 = .612 Net price equivalent rate. For each dollar you are spending about 60 cents.Step 3. Calculate the net price (actual cost to buyer) $15,000 X .612 = $9,180Step 1. Subtract each chain discount rate from 100% (find the complement) and convert each percent to a decimal.Trade Discount AmountList price x Trade discount rate = Trade discount amount $5,678 x 25% = $1,419.50Net Price List price -- Trade discount amount = Net Price

6 0
3 years ago
(5x^2+3x+4)-(2x^2+5x-1)
DedPeter [7]
Answer:
The answer is (3x^2-2x+5)
6 0
3 years ago
85,109,178 in world form
igor_vitrenko [27]
Eighty five million, one hundred nine thousand, one hundred seventy-eight. 
5 0
3 years ago
Factor –7x3 21x2 3x – 9 by grouping. what is the resulting expression?
MakcuM [25]

The resulting expression on factorization by grouping method is (3-7x²)(x-3).

<h3>What is Factorization?</h3>

Factorization is a method in which an Integer or an expression is written in terms of product of its fractions.

The expression given in the question is

–7x³ + 21x² + 3x – 9

This equation has to be factorized using grouping method.

group of two or more is formed and common term is taken out.

-7x² (x -3) +3(x-3)

( -7x²+3) (x-3)

(3-7x²)(x-3)

The resulting expression on factorization by grouping method is

(3-7x²)(x-3).

To know more about Factorization

brainly.com/question/24182713

#SPJ1

5 0
2 years ago
The formula to determine the asking price on a house is P=q+2n where q is the quality and n is the neighborhood. 1. Solve the eq
kotykmax [81]
1.q=p-2n
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Hope this helps :)
8 0
3 years ago
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