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marishachu [46]
3 years ago
8

Solving polynomial equations

Mathematics
1 answer:
Yuliya22 [10]3 years ago
5 0

Answer:

x= 1 or x= 1.56 (3 s.f.) or x= -2.56 (3 s.f.)

Step-by-step explanation:

Please see attached picture for full solution.

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Find the values of a, b and c
katrin [286]

Answer:

3rd option

Step-by-step explanation:

use hypotenuse method

8 0
2 years ago
Mary has some trading cards. Julie has 3 times as many trading cards as Mary. They have 36 trading cards in all. Which of these
riadik2000 [5.3K]

Answer:

C. X+3x=36

Step-by-step explanation:

1. If you add the x's to get: 4x=36

2. Do division to get 9.

3. if you plug in 9 in the original,and multiply: 9+27=36

4. There's your answer..... and i ran out of steps.

3 0
3 years ago
An honest die is rolled. If the roll comes out even (2, 4, or 6), you will win $1; if the roll comes out odd (1,3, or 5), you wi
jenyasd209 [6]

Answer:

(a) 50%

(b) 47.5%

(c) 2.5%

Step-by-step explanation:

According to the honest coin principle, if the random variable <em>X</em> denotes the number of heads in <em>n</em> tosses of an honest coin (<em>n</em> ≥ 30), then <em>X</em> has an approximately normal distribution with mean, \mu=\frac{n}{2} and standard deviation, \sigma=\frac{\sqrt{n}}{2}.

Here the number of tosses is, <em>n</em> = 2500.

Since <em>n</em> is too large, i.e. <em>n</em> = 2500 > 30, the random variable <em>X</em> follows a normal distribution.

The mean and standard deviation are:

\mu=\frac{n}{2}=\frac{2500}{2}=1250\\\\\sigma=\frac{\sqrt{n}}{2}=\frac{\sqrt{2500}}{2}=25

(a)

To not lose any money the even rolls has to be 1250 or more.

Since, <em>μ</em> = 1250 it implies that the 50th percentile is also 1250.

Thus, the probability that by the end of the evening you will not have lost any money is 50%.

(b)

If the number of "even rolls" is 1250, it implies that the percentile of 1250 is 50th.

Then for number of "even rolls" as 1300,

1300 = 1250 + 2 × 25

        = μ + 2σ

Then P (μ + 2σ) for a normally distributed data is 0.975.

⇒ 1300 is at the 97.5th percentile.

Then the area between 1250 and 1300 is:

Area = 97.5% - 50%

        = 47.5%

Thus, the probability that the number of "even rolls" will fall between 1250 and 1300 is 47.5%.

(c)

To win $100 or more the number of even rolls has to at least 1300.

From part (b) we now 1300 is the 97.5th percentile.

Then the probability that you will win $100 or more is:

P (Win $100 or more) = 100% - 97.5%

                                   = 2.5%.

Thus, the probability that you will win $100 or more is 2.5%.

7 0
2 years ago
Least common multiple of 8 and 12
umka21 [38]
I believe the answer is 4
hopee this helped u 
3 0
3 years ago
Read 2 more answers
A landscaper is creating a rectangular flower bed such that the width is half of the length.The area of the flower that is 34 ft
Leviafan [203]
The Area is A=l * w and we know that w=\frac{l}{2}

Therefore: 34=l * \frac{l}{2} = \frac{l^{2}}{2}
68=l^{2}
\sqrt{68}=l=8.246
and thus:
w=\frac{8.246}{2}
w=4.123
round to nearest tenth:
w=4.1feet
6 0
3 years ago
Read 2 more answers
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