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VashaNatasha [74]
3 years ago
15

A coin is tossed 10 times. Find the chance of getting exactly 5 heads. Find the chance of obtaining between four and six heads i

nclusive.
Mathematics
1 answer:
Korolek [52]3 years ago
4 0
The chance of getting 5 heads is 50% because there are only two sides to a coin hope this helps
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Clark typed 720 words in 18 minutes. How many words can he type in one minute?​
viva [34]

Answer:

Clark can type 40 words in one minute

Step-by-step explanation:

  1. Set up a proportion: \frac{720}{18} = \frac{x}{1}  
  2. Cross multiply, then divide: 720 × 1 = 720, 720 ÷ 18 = 40
  3. So, x = 40

I hope this helps!

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3 years ago
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12x +18<br> :)<br> 6<br> what’s the work
slava [35]

Answer:

6(2x+3)

Step-by-step explanation:

12x +18

Factor out 6 from each term

6*2x+ 6*3

6(2x+3)

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Reduce to lowest term. 2x^2- 18/x^2+4x-21​
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Answer:

\frac{2(x+3)}{x+7}

Step-by-step explanation:

Given

\frac{2x^2-18}{x^2+4x-21} ← factorise numerator and denominator

2x² - 18 ( factor out 2 from each term )

= 2(x² - 9) ← difference of 2 squares

= 2(x - 3)(x + 3)

and

x² + 4x - 21 = (x + 7)(x - 3) , then

= \frac{2(x-3)(x+3)}{(x+7)(x-3)} ← cancel common factor (x - 3) on numerator/ denominator

= \frac{2(x+3)}{x+7}

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At a certain store a cd cost $12 if the cost or cds were graphed as the output compared to the number of cds purchased as input
xxTIMURxx [149]
I’m pretty sure the answers D
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The functions f(x) = −(x − 1)2 + 5 and g(x) = (x + 2)2 − 3 have been rewritten using the completing-the-square method. Apply you
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Answer:

The vertex form of a quadratic function:

(h,k) - the coordinates of the vertex

If a>0, then the parabola opens upwards, so the vertex is the minimum of the function.

If a<0, then the parabola opens downwards, so the vertex is the maximum of the function.

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3 years ago
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