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dolphi86 [110]
3 years ago
6

Which is the decimal expansion of the following 1/5

Mathematics
1 answer:
amid [387]3 years ago
7 0

Answer:

Decimal expansion of 1/5 = 0.2

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I NEED HELP ASAP PLEASE!!
Makovka662 [10]

Answer:

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

zeros, x intercepts:  -3/2, 3/2

Step-by-step explanation:

4x^2 -9

We know the difference of squares is a^2 -b^2

This factors into (a-b) (a+b)

Let 4x^2 =a^2  

Taking the square root

2x =a

Let b^2 =9

Taking the square root

b= 3

(4x^2-9 ) = (2x-3) (2x+3)

To find the zeros, we set the equation equal to zero

(4x^2-9 ) = (2x-3) (2x+3) =0

Using the zero product property

2x-3 =0   and 2x+3 =0

2x-3+3 = 0+3                    2x+3-3 = 0-3

2x=3                                  2x=-3

Divide by 2

2x/2 = 3/2                               2x/2 = -3/2

x = 3/2                                       x = -3/2

These are the zeros of the equation (which are also the x intercepts)

8 0
3 years ago
Lance rolls a die 5 times. What is the probability that he rolls an even number all five times?
dusya [7]
If it is a six-sided dice, then the probability would be about an 8% chance.
8 0
3 years ago
Read 2 more answers
What is the Square root of -100
lidiya [134]

Answer:

10i

Step-by-step explanation:

√(-100)

Use the imaginary number rule  i=\sqrt{-1}

√(-1) × √(100)

i × √(10²)

i × 10

= 10i

6 0
3 years ago
Read 2 more answers
A bag contains purple marbles and blue marbles, 41 in total. The number of purple marbles is 4 less than 2 times the number of b
Andreas93 [3]

Answer:

There are 26 purple marbles in the bag.

Step-by-step explanation:

1) We have purple (p) and blue (b) marbles in a bag, and 41 marbles total so:

p+b = 41

2) we want to know how many purple marbles we have, so let's rearrange for p:

p = 41 - b

3) Our problem gives us an expression for the purple marbles in terms of the blue,  let's write it using math symbols instead of words:

<em>"The number of purple marbles is 4 less than 2 times the number of blue marbles."</em>

so: p = 2b - 4

3) Now we're going to plug this in (or substitute it) for our p in our first equation, and solve for b

p = 41 - b

2b - 4 = 41 - b     (substitution)

2b = 45 - b         ( add 4 to both sides)

3b = 45               (add b to both sides)

b = 15                  (divide both sides by 3)

4, last step!)

Now we know we have 15 blue marbles, that's great! But we still want to know how many purple marbles we have.

41- 15 = 26 purple marbles

4 0
3 years ago
Create an expression that simplifies to sin x
Dimas [21]

Answer:

2\cdot \sin 0.5x \cdot \cos 0.5x

Step-by-step explanation:

Here is one example:

2\cdot \sin 0.5x \cdot \cos 0.5x

\sin 0.5x \cdot \cos 0.5x + \cos 0.5x\cdot \sin 0.5x

\sin (0.5x + 0.5x)

\sin x

4 0
3 years ago
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