MATHEMATICS HIGH SCHOOL

Which of the following is a complex number?2+ 34 9i
Which of the following is a complex number?2+ 34 9i - 1

Answers

Answer 1
Answer:

Answer:

Option 3 -  4+9i                          

Step-by-step explanation:

Given : Options in the figure.

To find : Which of the following is a complex number?

Solution :

Complex number is defined as the number which contains real number along with imaginary number.

The complex number is in the form of a+ib.

Now, we determine one by one.

Option 1 - -7

-7 is the real number not complex.

Option 2 -2+√(3)

2+√(3) is the real number not complex.

Option 3 -4+9i

4+9i is in the form a+ib so it is a complex number.

Option 4 - \pi

\pi is the real number not complex.

Therefore, Only option 3 is the complex number.
Answer 2
Answer: 4+9i, since i is a complex number which is the square root of 1. It is the only solution with i in it.

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What is the value of x in the equation –x = 4 – 3x + 6?

Answers

remember you can do anything to an equaiton as long as you do it to both sides


-x=4-3x
add 3x both sides
3x-x=4+3x-3x
2x=4+0
2x=4
divide 2
2x/2=4/2
2/2x=2
1x=2
x=2

Answer:

The answer is x=5

Entre os alunos que frequentam o Ensino Profissional na escola do Carlos foi recolhida umaamostra de 50 aos quais se colocou a questão:

«Qual das seguintes frases exprime melhor o teu gosto pelo estudo da Matemática?

Gosto muito.
Gosto de certos conteúdos.
Gosto pouco.
Não gosto nada.»
O seguinte gráfico traduz as respostas obtidas à questão anterior.





1.1. Indique a variável em estudo e a sua natureza.

1.2. Calcule a percentagem de alunos que responderam «Gosto muito».

1.3. Observe a seguinte tabela ainda referente à mesma questão.



Rapazes

Raparigas

Gosto muito

12

6

Gosto de certos conteúdos

8

7

Gosto pouco

6

6

Não gosto nada

2

3

Escreva um pequeno texto no qual justifique que, neste estudo, os rapazes mostraram ter um maior gosto pelo estudo da Matemática

Answers

Answer:

taco

Step-by-step explanation:

no hablos espanol

The equation of a parabola is shown.x-7=3/4y^2
What are the coordinates of the focus?
A.) (71/3,0)
B.) (7,-1/3)
C.) 73/4,0)
D.) 7,-3/4)

Answers

The axis of symmetry for this parabola is the x-axis. The general form of the equation is:
4p(x-h) = (y-k)^2
where the focus has the coordinates of (h+p,k)

Manipulating the given equation to the general form:
4(1/3)(x-7)^2 = (y - 0)^2

Therefore the coordinates of the focus is:
(7+(1/3),0)

The answer is A.) (71/3,0)

Based on the information marked in the diagram, ABCD and AEFG must becongruent.
С
17
E
A. True
B. False

Answers

The answer is A. True

Sandy is working with a carpenter to frame a house. They are using 8-foot-long boards, but each board must be cut to be 94.6 inches long. How much is cut off each board?

Answers

8 foot = 8*12 inches

A farm has a small water tank with a diameter of 10 feet and a height of 4 feet. What isthe lateral surface area of the water tank?
40 square feet
125.6 square feet

Answers

B is the answer luv
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