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horrorfan [7]
3 years ago
13

Three coins are tossed. What is the probability that all three will land heads up?

Mathematics
1 answer:
Rus_ich [418]3 years ago
7 0

Answer:

1/8

Step-by-step explanation:

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4 0
3 years ago
Which of the following constants can be added to x2 - 3x to form a perfect square trinomail?
serious [3.7K]

The constant that can be added to x^2 - 3x to form a perfect square trinomial is 2\frac{1}{4}

The given expression is

x^2 - 3x

To form a perfect square trinomial

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

The given expression is

x^2 - 3x

first we have to add a constant term with it

x^2 - 3x + z

By comparing the given expression and the perfect square trinomial

a^2 =x^2

a = x

Similarly

-2ab = 3x

where know a =x

Then,

-2b = 3

b = -3/2

Similarly

b^2 = z

(\frac{-3}{2})^2 = z

9/4 = z

Convert the simple fraction to mixed fraction

9/4 = 2\frac{1}{4}

Hence, the constant that can be added to x^2 - 3x to form a perfect square trinomial is 2\frac{1}{4}

The complete question is :

Which of the following constants can be added to x2 - 3x to form a perfect square trinomial?

1\frac{1}{2},2\frac{1}{4} and 4\frac{1}{2}

Learn more about perfect square trinomial here

brainly.com/question/16615974

#SPJ1

4 0
1 year ago
How many pairs of whole numbers have a sum of 40
Ahat [919]
It is 20 
39+1
38+2
37+3
36+4
35+5
<span>Until you get to 20+20</span>
3 0
3 years ago
Determine 30% of 70.<br><br><br> using double number line
Vadim26 [7]

Answer:

100%     -     70

---------------------

30%      -      x

100x=70*30\\100x=2100\\x=\frac{2100}{100}\\x=21

3 0
3 years ago
there are 1012 souvenir paperweights that need to be packed in boxes each box will hold 12 paperweights how many boxes will be n
Rzqust [24]

1012 divided by 120 is 8.43 so 9 boxes will be needed

5 0
3 years ago
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