If a coin is flipped 20 times, what is the probability of getting 1 heads?

Answers

Answer 1

Answer: Its 1/2 tossing a coin is an independent event, its not dependent on how many times it has been tossed.

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According to the rules of significant figures, the number of digits that are estimated in a measurement is:a. one.
b. two.
c. three.
d. none.

Answers

According to the rules of significant figures in counting the number of significant figures when dealing with the measurement, especially when it is scientifically measured, you must consider 2 zeros at the right of the period. For example, in 98.00 there are 4 significant figures

Ratio equal to the ratio given 12:7

Answers

To find an equal ratio, just multiply both sides of the ratio by the same number.

12:7
12(2):7(2)
24:14

12:7 = 24:14

as 12:7 = 12/7
therefore to get equivalents of a fraction we multiply the nominator and the denominator with a same no
let us take 2
then, 12x2/7x2 =24/14
your ans is 24/14

On a number line, a number, b, is located the same distance from 0 as another number, a, but in the opposite direction. The number b varies directly with the number a. For example b = 2 when a = –2. Which equation represents this direct variation between a and b?

Answers

Answer:

The equation is b = -a

Step-by-step explanation:

Given,

The number b varies directly with the number a,

That is, we can write,

b ∝ a

⇒ b = ka

Where k is the constant of proportionality,

Given, if b = 2 then a = -2,

By substituting the value,

2 = k(-2)

⇒ k = -1

Hence, the equation that represents the direct variation between a and b is,

b = -a

y=kx is the equation for direct variation

Find the quotient.(6x 2 + 23x + 20) ÷ (5 + 2x)

3x - 4
3x + 4
3x +19

Answers

$(6x^(2) + 23x + 20)/(2x + 5) = (6x^(2) + 15x + 8x + 20)/(2x + 5) = (3x(2x) + 3x(5) + 4(2x) + 4(5))/(2x + 5) = (3x(2x + 5) + 4(2x + 5))/(2x + 5) = ((3x + 4)(2x + 5))/(2x + 5) = 3x + 4$

The answer is B.

Answer:

3x+4

Step-by-step explanation:

Brandon uses the steps below to solve the equation 15x+6=14x+5 using algebra tiles. Step 1 Add 14 negative x-tiles to both sides. Step 2 Add 5 negative unit tiles to both sides Step 3 The solution is x=1 Which explains whether Brandon is correct?

Answers

Answer:

No he was not correct

Step-by-step explanation:

The Equation is 15 x + 6 = 14 x + 5

now By the steps brandon used let us solve the question

Step 1 : Add 14 negative x tile to both sides

which will make the equation

15x + 6 - 14x = 14x + 5 - 14 x

x + 6 = 5 .......(ii)

Step 2: Add 5 negative unit tiles to both sides of equation (ii)

which will make the equation

x +6 - 5 = 5 - 5

x + 1 = 0 .........(iii)

Step 3: x =1 is the answer

but from equation (iii) we see that

x + 1 =0

by adding -1 on both sides

x + 1 -1 = 0-1

x = -1

So the step three done by Brandon is wrong which explains he was not correct

Answer:

D.) Brandon is not correct because he should have added 6 negative unit tiles to isolate the variable in step 2.

Step-by-step explanation:

YOUR WELCOME!! I took the test on Edge!! :)

If the standard deviation for a data set is equal to 9, then the variance for that data set is equal to___

Answers

81 because standard deviation is equal to the square root of the variance.

Final answer:

In a data set, if the standard deviation is given as 9, the variance would be the square of that which equals to 81.

Explanation:

The standard deviation and variance are closely related in statistics. Standard deviation is the square root of the variance. Therefore, if the standard deviation for a data set is given as 9, then the variance would be the square of that value.

To calculate this, you would do the following:

Take the standard deviation which is 9.
Square the standard deviation: 9*9 = 81.

So, if the standard deviation for a data set is 9, then the variance for that data set is equal to 81.

Learn more about Standard Deviation and Variance here:

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