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alex41 [277]
2 years ago
10

How many gallons of a 3% salt solution must be mixed with a 7% salt solution to obtain 100 gallons of a 5% salt solution.

Mathematics
1 answer:
MrRissso [65]2 years ago
6 0

Answer:

50 gallons of each.

Step-by-step explanation:

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Can someone help me solve this?
Dovator [93]

Answer:

5 felt pads.

7 cards.

Step-by-step explanation:

Remark

  • The total number of items is 12
  • So let the felt sheets be x
  • Let the cards = y

Equations and Solution

x + y = 12

Now the price is 7.75 that she has to pay for the 12 items. She wants to come back with 0 dollars.

0.5x + 0.75y = 7.75             Multiply this equation by 2

x + 1.5y = 15.50                    write the first equation underneath and subtract.

<u>x +    y =   12</u>

      .5y =  3                          Divide by 0.5

y = 3/0.5

y = 7

So she can get 7 cards.

x + y = 12

x + 7 = 12

x = 12 - 7

x = 5

So she can buy 5 felt pads.

8 0
3 years ago
Solution set of 3x - ( 2x + 8 )= -6
Hunter-Best [27]
3x - (2x + 8) = -6
3x -2x - 8 = -6
x - 8 = -6
x - 8 + 8 = -6 + 8
x = 2
6 0
3 years ago
What is the value of y?
Verizon [17]

Answer:

The answer is C (46)

Step-by-step explanation:

Since the measurement of the triangle is 180 then you must subtract 180 by 88 to create 92 and divided that 92 by 2 to get 46.

7 0
3 years ago
In 2016, the top 1 percent of taxpayers accounted for more income taxes paid than the bottom 90 percent combined. The top 1 perc
qaws [65]

Answer:

$464Billion

Step-by-step explanation:

If 37.3%=$538B

32.2%=?

By \ Cross \ Multiplying:-\\32.2\%=>\frac{32.2\%*538}{40\%}\\=464.440

32.2% is roughly $464Billion in taxes

3 0
3 years ago
The angle between the minute hand and the hour hand of a clock is 90 degrees. What time is it? Justify your answer.
tangare [24]
If it is exactly 90 degrees you are looking for, your answer would be, 3:0:0. Which is 3:00.
3 0
3 years ago
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