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vitfil [10]
3 years ago
14

7 + 2X = 5 3 ..... zzzzzzzz

Mathematics
2 answers:
Alex787 [66]3 years ago
8 0

Answer:

23

Step-by-step explanation:

please mark brainliest

Elan Coil [88]3 years ago
4 0

Answer:

x = 23

Step-by-step explanation:

7 + 2x = 53

7 + 2x - 7 = 53 - 7

2x = 46

2x / 2 = 46 / 2

x = 23

Hope this helps

Maybe brainliest?

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Find a polynomial function of degree 3 with 2, i, -i as zeros.
sergiy2304 [10]

Answer:

p(x)= x^3-2x^2+x-2

Step-by-step explanation:

Here we are given that a polynomial has zeros as 2 , i and -i . We need to find out the cubic polynomial . In general we know that if \alpha , \ \beta \ \& \ \gamma are the zeros of the cubic polynomial , then ,

\sf \longrightarrow p(x)= (x -\alpha )(x-\beta)(x-\gamma)

Here in place of the Greek letters , substitute 2,i and -i , we get ,

\sf\longrightarrow p(x)= (x -2 )(x-i)(x+i)

Now multiply (x-i) and (x+i ) using the identity (a+b)(a-b)=a² - b² , we have ,

\sf  \longrightarrow p(x)= (x-2)\{ x^2 - (i)^2\}

Simplify using i = √-1 ,

\sf \longrightarrow p(x)= (x-2)( x^2 + 1 )

Multiply by distribution ,

\sf \longrightarrow p(x)= x(x^2+1) -2(x^2+1)

Simplify by opening the brackets ,

\sf\longrightarrow p(x)= x^3+x-2x^2-2

Rearrange ,

\sf\longrightarrow \underline{\boxed{\blue{\sf p(x)= x^3-2x^2+x-2}}}

4 0
3 years ago
Solve using perfect square factoring patterns. y2 + 16y + 64 = 0 {8} {0, –1} {–8} {8, –8}
lubasha [3.4K]

Answer:

y^2 + 16y + 64 = 0

(y + 8)(y+8) = 0

y + 8 = 0

y = -8

y + 8 = 0

y = -8

Step-by-step explanation:

7 0
3 years ago
A sample of 90 people is taken from a population. The standard deviation of the sample is 34.4. What is the approximate value of
Vikki [24]

Answer:

The approximate value of the standard error of the sampling distribution is 3.63.

Step-by-step explanation:

We are given that a sample of 90 people is taken from a population. The standard deviation of the sample is 34.4.

Firstly, Standard error basically tells us that how much sample mean is deviated from the actual or true mean of the population.

It is most useful in constructing a confidence interval about population parameters.

<u></u>

<u>Now, as we know that the formula for finding standard error is given by;</u>

            Standard error =  \frac{s}{\sqrt{n} }

where, s = standard deviation = 34.4

            n = sample size of people = 90

So,  Standard error of the sampling distribution =  \frac{34.4}{\sqrt{90} }

                                                                               =  <u>3.63</u>.

6 0
3 years ago
What is the degree of 24x?
never [62]

Answer:

one

Step-by-step explanation:

8 0
3 years ago
Need help please its a missing assignment and i need to turn it in at midnight
dimaraw [331]

C=pi*d

Where pi is 3.14 and d is the diameter, in this case is 14ft. Find the circumference

\begin{gathered} C=\pi\cdot d \\ C=3.14\cdot14ft \\ C=43.96ft \end{gathered}

8 0
1 year ago
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