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kotykmax [81]
3 years ago
8

Please answer the picture below!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Mathematics
2 answers:
Temka [501]3 years ago
7 0

Surface area of the base = 4^2 = 16 units^2.

Area of each triangular side = 1/2 * 4 * 3 = 6 unts^2

Total surface area of the pyramid = 16 + 4 * 6 = 40 unit^2 (answer)

Paraphin [41]3 years ago
7 0
The formula is:
SA = s2 + 2 × s × l where s is the base side pf the piramid which is 4, and "l" is the slant hight pf the piramid the imaginary line from the tip of the piramid going perpendicular on the piramid square surface.
SA = 4^2 + 2x4x3,60
SA = 44,8

SA is the Surface Area

For detailed solving check my picture attached!

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9514 1404 393

Explanation:

Both sides of the equation are squared.

  \dfrac{x-12}{4}=\sqrt{x} \qquad\text{given}\\\\ \left(\dfrac{x-12}{4}\right)^2=x \qquad\text{square both sides}\\\\ \left(\dfrac{x}{4}-3\right)^2=x \qquad\text{divide out the fraction}\\\\ \dfrac{x^2}{4^2}-\dfrac{6}{4}x+9=x \qquad\text{$(a-b)^2=a^2-2ab+b^2$}\\\\\dfrac{x^2}{16}-\dfrac{5x}{2}+9=0 \qquad\text{subtract $x$}

I like this better without fractions, so would multiply by 16 at this point (or earlier).

  x^2 -40x +144 = 0

  (x -36)(x -4) = 0

  x = 4 or 36 . . . . . . x = 4 is extraneous

The solution is x = 36.

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3 years ago
Last week, Lisa drove 12 meters to visit her uncle. Is it meters, centimeters, kilometers, or millimeters?
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Step-by-step explanation:

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PilotLPTM [1.2K]
Answer: 4:38 pm

I hope this help you
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