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Komok [63]
3 years ago
6

A pharmacist has 80 milileters of a 25 percent saline solution. Which expression can be used to find the percentage of the conce

ntration
Mathematics
1 answer:
Thepotemich [5.8K]3 years ago
6 0

Answer:


Step-by-step explanation:

Final concentration % = [grams of salt / mililiters of solution] * 100


grams of salt = grams of salt from solution 1 + grams of salt from solution 2


grams of salt from solution 1 = mililiters * %/100 = 80 mililiters * 0.25 g/mililiters = 20 g


grams of salt from solution 2 = mililiters *%/100 = x*0.10 g/mililiters = 0.1x


mililiters of final solution = mililiters from solution 1 + mililiters from solution 2


mililiters of final solution = 80 mililiters + x mililiters


=> Final concentration, %  =  [0,10x + 20 g] / [x + 80 mililiters] * 100


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3 years ago
Identify the linear term in the function.<br><br> y = 2x2 − 5x − 12
uranmaximum [27]

Answer:

Step-by-step explanation:

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3 years ago
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Molodets [167]

Answer:

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Division property of equality:

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As per the statement:

Given the equation: -3(x+2)=9

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1.

-3x -6 = 9               [Distributive property]

2.

-3x = 15                 [Addition property of equality]

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3 years ago
Read 2 more answers
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8 0
3 years ago
Find the approximate perimeter of ABC plotted below.
maksim [4K]

Answer:

B. 21.2

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A(-4, 1)

B(-2, 3)

C(3, -4)

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AB = \sqrt{(x_2 - x_1)^2 + (y_2 - y_1)^2}

AB = \sqrt{(-2 - (-4))^2 + (3 - 1)^2} = \sqrt{(2)^2 + (2)^2)}

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BC = \sqrt{(x_2 - x_1)^2 + (y_2 - y_1)^2}

BC = \sqrt{(3 - (-2))^2 + (-4 - 3)^2} = \sqrt{(5)^2 + (-7)^2)}

BC = \sqrt{25 + 49}

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BC = 8.6 units (nearest tenth)

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AC = \sqrt{(x_2 - x_1)^2 + (y_2 - y_1)^2}

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AC = \sqrt{47 + 25}

AC = \sqrt{74}

AC = 8.6 units (nearest tenth)

Perimeter of ∆ABC = 4 + 8.6 + 8.6 = 21.2 units

8 0
3 years ago
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