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liubo4ka [24]
3 years ago
12

22

Mathematics
1 answer:
astra-53 [7]3 years ago
7 0

Answer:

c = 132

Step-by-step explanation:

c  = 2\pi \: r \\  = 2 \times  \frac{22}{7}  \times 21 \\  = 132cm

<em>hope</em><em> </em><em>this</em><em> </em><em>helps</em>

<em>brainliest</em><em> </em><em>appreciated</em>

<em>good</em><em> </em><em>luck</em><em>!</em><em> </em><em>have</em><em> </em><em>a</em><em> </em><em>nice</em><em> </em><em>day</em><em>!</em>

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Answer these three please!!
katen-ka-za [31]

Answer:

10. x = 3 ± 2√6

11. x = 4 ± √6

12. x = \frac{- 7 + \sqrt{109}}{10} and x = \frac{- 7 - \sqrt{109}}{10}

Step-by-step explanation:

10. Given the quadratic equation (x - 3)² + 14 = 38

We have to solve it by square root.

Now, (x - 3)² + 14 = 38

⇒ (x - 3)² = 38 - 14 = 24

⇒ (x - 3)² = (2√6)²

Now, square rooting both sides we get,

(x - 3) = ± 2√6

⇒ x = 3 ± 2√6 (Answer)

11. Given the quadratic equation x² - 8x + 10 = 0

We have to solve it by completing the square.

Now, x² - 8x + 10 = 0

⇒ x² - 2(4)(x) + 4² = 4² - 10

⇒ (x - 4)² = (√6)²

Now, square rooting both sides we get,

x - 4 = ± √6

⇒ x = 4 ± √6 (Answer)

12. Given the quadratic equation 5x² + 7x - 3 = 0

We have to solve it by quadratic formula.

Hence,

x = \frac{- 7 + \sqrt{7^{2} - 4 (5)(- 3)}}{2(5)} and x = \frac{- 7 - \sqrt{7^{2} - 4 (5)(- 3)}}{2(5)}

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6 0
4 years ago
ASAP ASAP ASAP PLS ANSWER
MA_775_DIABLO [31]

area triangle:

(1.7m×2m)×2

= 1.7m²

-> 2 triangles so: 1.7m²×2= 3.4m²

area rectangles(walls):

2m×3m

= 6m²

-> 2 walls so: 6m²×2=12m²

area bottom rectangle:

3m×2m=6m²

-> total area:

6m²+12m²+3.4m²= 21.4m²

6 0
2 years ago
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goldenfox [79]

Answer:

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3 0
3 years ago
Explain how to create a Stem-and-Leaf plot using the 6 rules. And write down what the 6 rules are.
Ulleksa [173]

Answer:

The 6 rules/steps are below

Step-by-step explanation:

1. determine the smallest and largest number

2. Using the largest and smallest number, make sure that your graph can fit both of those numbers

3. identify the stems/tens place

4. fill in the leaves/ones place

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Write 3/9 in simplest form
Gnoma [55]
That would be 1/3 because 3 can go into 3 once and 3 can go into 9 three times.
5 0
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