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svlad2 [7]
2 years ago
14

How many gallons of a 12% salt solution should a biologist add to 5 gallons of a 15% salt solution to get a 14% solution?

Mathematics
1 answer:
Zarrin [17]2 years ago
4 0

The volume of the 12% salt solution to be added is; 2.5 gallons.

<h3>Ratio and Proportion of Volume</h3>

Let the volume of 12% required be x and the new volume of the mixture be (x+5).

On this note, it follows that;

  • 12x + 15(5) = 14(5+x)

  • 12x + 75 = 70 + 14x.

Hence, -2x = -5

Divide both side by -2;

  • x = -5/-2

x = 2.5 gallons.

Read more on ratios and Proportions;

brainly.com/question/13513438

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liubo4ka [24]

Answer:

um oof

Step-by-step explanation:

4 0
3 years ago
How many zeros will the 7 x 50 product have? explain how you know
Nadusha1986 [10]

Answer:

7x50 will have one 0 !

Explanation:

I usually just take the zero out and multiply the other numbers (7x5). So, seven times five is 35, then now i add the zero!

Step by step explanation:

7x5∅

7x5=35

Since I took away the zero, I will now add it back after I get the answer.

35←0

350

ONE ZERO!

<u><em>hope i helped you! sorry if its confusing!</em></u>

6 0
3 years ago
It costs the school band SS dollars per sandwich that they make. The band sells each sandwich for 20\%20% more than it costs to
Annette [7]

Money Required for making 1 Sandwich that is Cost Price of 1 Sandwich = S Dollar

Selling Price of 1 Sandwich = 20 % more than Cost Price S

                    = S + 20 % of S

                     = \frac{20S}{100}+S=\frac{120S}{100}

                     =$ 1.20 S

                      = $(S + 0.20 S)

Selling Price of 73 Sandwiches = $ 73 (S + 0.20 S)

The expression $73(S+0.2 S) →→  Selling Price of 73 Sandwiches          



5 0
3 years ago
Read 2 more answers
Need help with #5.<br> Find angle and solve for x
Leona [35]

Answer:

see explanation

Step-by-step explanation:

The 2 marked angles are vertical and congruent, thus

24x = 23x + 5 ( subtract 23x from both sides )

x = 5

Thus angles = 24 × 5 = 120°

6 0
3 years ago
On the coordinate plane shown, each grid unit represents 10 feet. Polygon QRST has vertices Q(10, 30), R(−20, 30), S(−20, −10),
max2010maxim [7]

P  140 units

A  1200 units^2

Step-by-step explanation:

The length of the rectangle is 20 to -20 = 20 - -20 = 40 units

The width of the rectangle is 20 to -10 = 20 - -10 = 30 units

The perimeter is given by

P = 2 ( l+w) = 2 (40+30) = 2 (70) = 140 units

The area is given by

A = lw = 40*30 = 1200 units^2

4 0
2 years ago
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