MATHEMATICS MIDDLE SCHOOL

Can someone please help me!!
Can someone please help me!! - 1

Answers

Answer 1
Answer: Answer: B

If you would like further explanation let me know. :)
Answer 2
Answer: The answer would be B.

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Answers

Answer:

I would say c because if you have -2-(-4) you really have -2 + 4 so it would be a positive 2 instead of -2

If you are asked to compare two numbers, what two operations might you use? Why?

Answers

Subtraction: get how many units a number exceeds the other
Division: lets you know how much a number is larger (or smaller) than the other.

Someone please help me : evaluate 3st to the second power + 2s if s=5 and t=3??

Answers

s=5\ \ \ and\ \ \ t=3\n\n\Rightarrow\ \ \ 3st^2 + 2s=3\cdot 5\cdot3^2+2\cdot5=15\cdot9+10=135+10=145

Im having trouble on 2 questions... 2 (x-5)=x-8 and 2 (x-5)=x.... can u figure them out and explain how to get them.... thanks

Answers

2(x-5)=x-8\n2x-10=x-8\n2x-x=-8+10\nx=2\n\n2(x-5)=x\n2x-10=x\n2x-x=10\nx=10

One of the authors received a credit card bill to $2,944, but it included a charge of $1,898 that was not valid. Find the values of the absolute and relative errors. The value of the absolute error is $ (The value of the absolute error is) The value of the relative error is nothing% (round to the nearest integer as needed).

Answers

The absolute error is $1898, the relative error is 2

What is an absolute and relative error?

An absolute error is a determinant of how large an error is. A relative error defines how good or bad an error is.

The formula for determining an absolute error is;

  • Absolute error = measured value - actual value

The formula for determining a relative error is:

  • relative error = absolute error/actual value

From the parameters given:

The absolute error can be computed as:

Absolute error = 2944 - (2944 - 1898)

Absolute error = 2944 - 1046

Absolute error = $1898

The relative error = 1898/1046

The relative error = 1.8

The relative error ≅ 2 (as an integer)

Learn more about absolute error and relative error here:

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Your family wants to purchase a new laptop with a 17” widescreen. Since the 17 inches represents the diagonal measurement of the screen (upper corner to lower corner), you want to find out the actual dimensions of the laptop. When you measured the laptop at the store, the height was 10 inches, but you don’t remember the width. Calculate and describe how you could figure out the width of the laptop to the nearest tenth inch.

Answers

The size of the screen is an illustration of the Pythagoras theorem.

The width of the laptop is 13.7 inches

The given parameters are:

\mathbf{Diagonal = 17}

\mathbf{Height= 10}

Using Pythagoras theorem, we have:

\mathbf{Diagonal^2 = Height^2 + WIdth^2}

Substitute known values

\mathbf{17^2 = 10^2 + WIdth^2}

Collect like terms

\mathbf{WIdth^2 = 17^2 - 10^2}

\mathbf{WIdth^2 = 189}

Take square roots of both sides

\mathbf{Width = 13.7}

Hence, the width of the laptop is 13.7 inches

Read more about diagonals at:

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you would do
a^2+b^2=c^2
10^2+b^2=17^2
100+b^2=289
-100. = -100
b^2=189
√189
b=13.75
width is 13.75
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