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Tju [1.3M]
3 years ago
15

A 4% peroxide solution is mixed with a 10% peroxide solution, resulting in 100 L of an 8% solution. The table shows the amount o

f each solution used in the mixture. What is the value of z in the table?
Mathematics
2 answers:
vivado [14]3 years ago
6 0

Answer:

its 8

Step-by-step explanation:

100x0.08=8

plus i took the test on edg -_-

Novosadov [1.4K]3 years ago
5 0

Answer:

\textbf{There are }33\tfrac{1}{3}\textbf{ liters of the 4}\%\textbf{ solution and }66\tfrac{2}{3}\textbf{ liters of the 10}\%\textbf{ solution.}

Step-by-step explanation:

Let x represent the amount of 4% solution and y represent the amount of 10% solution.

⇒ x + y = 100 ..................(1)

x liters of the 4% solution gives us the expression 0.04·x

y liters of the 10% solution gives us the expression 0.10·y

100 L of the 8% solution gives us 0.08 × (100) = 8

⇒ 0.04·x + 0.10·y = 8 ...........(2)

This gives us the system of equations (1) and (2)

To solve this, we will use substitution.

Substituting x = 100 - y from equation (1) into equation (2). We get,

y = 66\tfrac{2}{3}

Substitute this value of y into the first equation:

x + 66\tfrac{2}{3} = 100\\\\\text{Subtract }66\tfrac{2}{3}\text{ from each side :}\\\\\implies x = 33\tfrac{1}{3}\\\\\textbf{Hence,There are }33\tfrac{1}{3}\textbf{ liters of the 4}\%\textbf{ solution and }66\tfrac{2}{3}\textbf{ liters of the 10}\%\textbf{ solution.}

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mash [69]

Answer:

\huge\boxed{[-5;\ -2)\ \cup\ [3;\ 13)}

Step-by-step explanation:

The following piecewise functions are linear functions. The graph of any of them is a line segment.

We just need to calculate the value of the function at each end specified in the brace.

y=3x-2\ \text{if}\ -1\leq x

Substitute x =-1 and x = 0:

x=-1\\y=3(-1)-2=-3-2=-5\\\\x=0\\y=3(0)-2=0-2=-2

Range of this piece is [-5; -2)

y=2x+3\ \text{if}\ 0\leq x

Substitute x =0and x = 5:

x=0\\y=2(0)+3=0+3=3\\\\x=5\\y=2(5)+3=10+3=13

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[-5;\ -2)\ \cup\ [3;\ 13)

Look at the picture.

6 0
3 years ago
I need to know how to solve <br> -4-(2+4(-6)-4-(2^2-5*2))
sweet-ann [11.9K]

Answer:

16

Step-by-step explanation:

This problem requires PEMDAS

Parentheses ( )

Exponents ^

Multiplication

Division

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Start by solving anything in parentheses. There's an exponent within the parentheses, so we change that 2^2 into 4 and also make sure to multiply 5 x 2 before subtracting.

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-4 - (2 + -24 - 4 - (-6))

Again, solve parentheses first.

-4 - (-22 - 4 - (-6))

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4 0
3 years ago
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Nikitich [7]
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3 0
3 years ago
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What is the value of x
kirza4 [7]
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8 0
3 years ago
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Nina [5.8K]

Answer:

114.75

Step-by-step explanation:

You just multiply 25.50 by 4.50 :))

Hope this helps and sorry if I'm wrong.

Have a wonderful rest of your day. <3

8 0
3 years ago
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