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1 year ago

A fair coin is flipped two times. Which diagram shows all of the possible outcomes?

Mathematics

1 answer:

kirza4 [7]1 year ago

6 0

Answer:

Step-by-step explanation:

It is the only one that has both heads and tails equally on all options, instead of heads heads or tails tails. There aren't any fair coins that are like that

hope this helps :)

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-6 (a) = 12 What is a? <br>

Vikki [24]

Answer:

-2

Step-by-step explanation:

A negative times a negative is a positive

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3 years ago

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Erin finds 5% sales tax for a shirt that costs $21. She calculates the tax as

kkurt [141]

Answer:

Step-by-step explanation:

a. Bicycle (1.07 x 45.90)

b. Shoes (1.06 x 67.50)

c. Laptop (1.08 x 299.99)

d. Video Game (1.04 x 39.95)

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2 years ago

Find the area of the circle with the given diameter.<br> d = 28 inches

alexdok [17]

Answer: 196pi in.^2

Step-by-step explanation:

Divide the diameter by two.

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3 years ago

fill in the empty spaces ANSWERS 1 21 -7 7 6 24 -1 .5 2.4(5h+10)-3=27 12h+__-3=27 12h+__=27 12h=__ h=__

dalvyx [7]

Answer:

h = 1/2

Step-by-step explanation:

Step 1: Write equation

2.4(5h + 10) - 3 = 27

Step 2: Distribute

12h + 24 - 3 = 27

Step 3: Combine like terms

12h + 21 = 27

Step 4: Subtract 21 on both sides

12h = 6

Step 5: Divide both sides by 12

h = 6/12

Step 6: Simplify

h = 1/2

4 0

2 years ago

If a = √3-√11 and b = 1 /a, then find a² - b²

Serga [27]

If $b=\frac1a$ , then by rationalizing the denominator we can rewrite

$b = \dfrac1{\sqrt3-\sqrt{11}} \times \dfrac{\sqrt3+\sqrt{11}}{\sqrt3+\sqrt{11}} = \dfrac{\sqrt3+\sqrt{11}}{\left(\sqrt3\right)^2-\left(\sqrt{11}\right)^2} = -\dfrac{\sqrt3+\sqrt{11}}8$

Now,

$a^2 - b^2 = (a-b) (a+b)$

and

$a - b = \sqrt3 - \sqrt{11} + \dfrac{\sqrt3 + \sqrt{11}}8 = \dfrac{9\sqrt3 - 7\sqrt{11}}8$

$a + b = \sqrt3 - \sqrt{11} - \dfrac{\sqrt3 + \sqrt{11}}8 = \dfrac{7\sqrt3 - 9\sqrt{11}}8$

$\implies a^2 - b^2 = \dfrac{\left(9\sqrt3 - 7\sqrt{11}\right) \left(7\sqrt3 - 9\sqrt{11}\right)}{64} = \boxed{\dfrac{441 - 65\sqrt{33}}{32}}$

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1 year ago