1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
olya-2409 [2.1K]
3 years ago
12

Is this correct if not correct me

Mathematics
2 answers:
trasher [3.6K]3 years ago
7 0
Yeah seems like it, but if not i’ll help you
AleksAgata [21]3 years ago
5 0
Yuppppppppppppppp yuh
You might be interested in
What are the solutions of x^2-2x+5=0
sweet [91]

The solution of x^{2}-2 x+5=0 are 1 + 2i and 1 – 2i

<u>Solution:</u>

Given, equation is x^{2}-2 x+5=0

We have to find the roots of the given quadratic equation

Now, let us use the quadratic formula

x=\frac{-b \pm \sqrt{b^{2}-4 a c}}{2 a}  --- (1)

<em><u>Let us determine the nature of roots:</u></em>

Here in x^{2}-2 x+5=0 a = 1 ; b = -2 ; c = 5

b^2 - 4ac = 2^2 - 4(1)(5) = 4 - 20 = -16

Since b^2 - 4ac < 0 , the roots obtained will be complex conjugates.

Now plug in values in eqn 1, we get,

x=\frac{-(-2) \pm \sqrt{(-2)^{2}-4 \times 1 \times 5}}{2 \times 1}

On solving we get,

x=\frac{2 \pm \sqrt{4-20}}{2}

x=\frac{2 \pm \sqrt{-16}}{2}

x=\frac{2 \pm \sqrt{16} \times \sqrt{-1}}{2}

we know that square root of -1 is "i" which is a complex number

\begin{array}{l}{\mathrm{x}=\frac{2 \pm 4 i}{2}} \\\\ {\mathrm{x}=1 \pm 2 i}\end{array}

Hence, the roots of the given quadratic equation are 1 + 2i and 1 – 2i

6 0
3 years ago
17. Let A denote the event that the next request for assistance from a statistical software consultant relates to the SPSS packa
ankoles [38]

Answer:

a. The probability is not equal to 1

b. P (A') = 0.70

c. P ( A U B ) = 0.80

d. P ( A' ∩ B' ) = 0.20

Step-by-step explanation:

a. Because these A and B are disjoint

b. since the probability of  A is 0.30 then the probability of A compliment is

    P(A compliment ) = 1 - P (A)

    P(A compliment ) = 1-0.30

    P(A compliment ) = 0.70

c. Since event are disjoint then intersection of A and B is 0, so probability of A U B is;

       P ( A U B ) = P (A) + P(B) - P(A∩ B)

       P ( A U B ) = 0.30 + 0.50 - 0

       P ( A U B ) = 0.80

d. The inetrsection of compilments of A and B are:

by using De Morgan's Law we have,

                     P ( A' ∩ B' ) = P [(A U B )']

                     P ( A' ∩ B' ) = 1 - P ( A U B )

                     P ( A' ∩ B' ) = 1 - 0.80

                     P ( A' ∩ B' ) = 0.20

5 0
3 years ago
What percent of 400 is 260
postnew [5]
260/400=0.65
your answer will be 65%
6 0
3 years ago
The length of a rectangle is twice its width. The Perimeter is 42 cm. Find the length of each side.​
lakkis [162]

Answer:

A) L = 2*W

B) 2L + 2W = 42

We'll put Equation A) into B)

2*2W + 2W = 42

4W + 2W = 42

6W = 42 cm

Width = 7 cm

Length = 14 cm

Step-by-step explanation:

4 0
3 years ago
A pair of jeans normally costs £40.
creativ13 [48]

Answer:

£30

Step-by-step explanation:

100% - 25% =75%

75% of £40

=£30

5 0
3 years ago
Other questions:
  • A certain type of plywood consists of six layers. The thickness of the layers are independent and normally distributed with mean
    7·1 answer
  • Write the mixed number -7 1/7 as an improper fraction.
    11·1 answer
  • A Television is advertised as 56 inches. This represents the diagonal dimension of the screen which also has a height of 40 inch
    7·2 answers
  • I need help on this. Thanks,<br><br> (picture attached)
    10·1 answer
  • ANYONEEEE ? I need to help
    7·1 answer
  • Do yall know any easy way to do slope​
    11·2 answers
  • 15.239 rounded to the nearest tenth
    14·2 answers
  • Which expression is equivalent to<br> -15163-3?Assume #w0D
    5·1 answer
  • 1) Write the equation parallel to the following equations that would go through (2,7):
    5·1 answer
  • What is the next term of the geometric sequence?<br> -1/7,4/7,-16/7
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!