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Anit [1.1K]
4 years ago
9

Clara says that if you square the number 4 and then divide the result 2, you end up with 4. Is Clara correct? Explain.

Mathematics
1 answer:
sertanlavr [38]4 years ago
3 0
Clara is incorrect. When you do the math, 4 squared is basically saying multiply four times four. Which equals Sixteen. When you divide Sixteen by two you get eight, not four. My math is listed below.

4^2 (4 • 4) = 16

16/2 = 8

Hopefully this helped and good luck!!
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351,875 + 249,926 = 601,801
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Which expression will produce an answer with the fewest significant figures?
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Triangle ABC is formed by the vertices A(1,2,-1), B(-3,-6,2)and C(3,-2,0).
Vesnalui [34]

Answer:

Point D: (0,-4, 1 )

<em>d</em> = √41

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right

<u>Pre-Calculus</u>

  • Midpoint Formula [3D]: (\frac{x_1+x_2}{2},\frac{y_1+y_2}{2}, \frac{z_1+z_2}{2} )
  • Distance Formula [3D]: d = \sqrt{(x_2-x_1)^2+(y_2-y_1)^2+(z_2-z_1)^2}

Step-by-step explanation:

<u>Step 1: Define</u>

Point A(1, 2, -1)

Point B(-3, -6, 2)

Point C(3, -2, 0)

<u>Step 2: Find Point D</u>

Simply plug in your coordinates B and C into the midpoint formula to find midpoint

  1. Substitute [MF]:                    (\frac{-3+3}{2},\frac{-6-2}{2}, \frac{2+0}{2} )
  2. Add/Subtract:                       (\frac{0}{2},\frac{-8}{2}, \frac{2}{2} )
  3. Divide:                                  (0,-4, 1 )

<u>Step 3: Find distance </u><em><u>d</u></em>

Simply plug in the 2 coordinates A and D into the distance formula to find distance <em>d</em>

  1. Substitute [DF]:                    d = \sqrt{(0-1)^2+(-4-2)^2+(1+1)^2}
  2. Subtract/Add:                       d = \sqrt{(-1)^2+(-6)^2+(2)^2}
  3. Exponents:                           d = \sqrt{1+36+4}
  4. Add:                                      d = \sqrt{41}
5 0
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The price of a cellular phone declines by 33 percents of its current value every year. At this rate, approximately how many year
Jobisdone [24]

Every year, the price of the smartphone is the 67\% of the price of the previous year (since we lose the 33\%, we remain with the 67\%).


Since 67\% can be written as \frac{67}{100}, the price after one year will be


243 \cdot \frac{67}{100} = 162.81


After two years, the price is the 67\% of the price after one year:


162.81 \cdot \frac{67}{100} =  109.08


And so on: after three years we have


109.08 \cdot \frac{67}{100} = 73.08


So, the answer is somewhere between three and four years.

5 0
3 years ago
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