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
Dima020 [189]
3 years ago
5

Simplify this expression (3 + i) - (2- 2i)

Mathematics
2 answers:
Burka [1]3 years ago
7 0

Answer:

1 + 3i

Step-by-step explanation:

So you are using complex numbers. Remember i is imaginary

                                                                           ...trust me that's big lol

But do standard subtraction.

- - = +

ivolga24 [154]3 years ago
4 0

1+3i

like standart algebra

You might be interested in
A study done by researchers at a university concluded that ​% of all student athletes in this country have been subjected to som
Nostrana [21]

The missing digits is highlighted in bold form

A study done by researchers at a university concluded that ​70% of all student-athletes in this country have been subjected to some form of hazing. The study is based on responses from 1800 athletes. What are the margin of error and​ 95% confidence interval for the​ study?

Answer:

Step-by-step explanation:

Given that:

The sample proportion \hat p = 0.70

The sample size n = 1800

At 95% confidence interval level:

The level of significance = 1 - 0.95 = 0.05

Critical value: Z_{0.05/2} = Z_{0.025} = 1.96

Thus, the Margin of Error E = Z_{\alpha/2}  \times \sqrt{\dfrac{\hat p ( 1- \hat p)}{n}}

= 1.96  \times \sqrt{\dfrac{ 0.70 ( 1-0.70)}{1800}}

= 1.96  \times \sqrt{\dfrac{ 0.70 ( 0.30)}{1800}}

= 1.96  \times \sqrt{\dfrac{0.21}{1800}}

= 1.96  \times \sqrt{1.16666667\times 10^{-4}}

the Margin of Error E = 0.021

At 95% C.I for the population proportion will be:

= \hat p \pm Z_{\alpha/2} \sqrt{\dfrac{\hat p(1- \hat p)}{n}}

= 0.70 ± 0.021

= (0.70 - 0.021, 0.70 + 0.021)

= 0.679, 0.721)

6 0
3 years ago
I need help please I don’t know how to make this can someone help me ?
NISA [10]

Answer:

the simplified answer is 3 3/4

Step-by-step explanation:

8 0
3 years ago
Write the equation of a line with the slope of 2, which contains the point
Crazy boy [7]

Answer:

y=2x-16

Step-by-step explanation:

So since we have a point and the slope, we can use the point-slope equation to find our equation of a line

y - y₁ = m(x - x₁)

Here our (x₁, y₁) point is (4, -8) and our m is 2

Plugging in these values to our equation gives us:

y - (-8) = 2(x - (4)) → distributing the negative to the -8 gives y + 8 = 2(x - 4) → distributing the 2 to the (x - 4) gives y + 8 = 2x - 8 → and finally subtracting the  8 from both sides gives our equation of a line y = 2x - 16

8 0
4 years ago
Twenty men can cut thirty trees in four hours. If four men leave the job, how many
Mice21 [21]

Answer:

As in 4 hours , 20 men can cut 30 trees. So, in 1 hour , 20 men can cut 30 trees / 4. So, in 6 hours, 20 men can cut 30 * 6 trees / 4 = 45 trees.

Step-by-step explanation:

done

8 0
3 years ago
Frankie scores a 70% on her math test. The test had 20 questions. How many questions did she get correct?​
ipn [44]

Answer:

14 questions correct

Step-by-step explanation:

x/20 *100 = 70

so x/ 20 = 70/100(0.7)

x/20 = 0.7

x = 0.7*20

x =14

3 0
3 years ago
Read 2 more answers
Other questions:
  • Convert 3/11 to a decimal equivalent using long division
    10·1 answer
  • X^2+13x-30 find the vertex
    14·1 answer
  • Which of the following angles is coterminal with 400°?
    5·1 answer
  • 20x2 + 3x + 5 = 7<br><br> Help
    8·2 answers
  • Kylie explained that (-4x+9)^2 will result in a difference of squares because (-4x+9)^2 (-4x+9)^2 =(-4x)^2+(9)^2=16x^2+81
    10·1 answer
  • What Is the difference between the number of students who earned a score 90 or greater In class 2 and the number of students who
    11·1 answer
  • Help me find answer please very much lost and its a test:(((will give brainiest or w.e it is
    11·1 answer
  • Simplify (-8pst + 3prq + 14) - (7prq - 20 - 2pst)​
    12·1 answer
  • An x-method chart shows the product a c at the top of x and b at the bottom of x. Above the chart is the expression a x squared
    8·2 answers
  • Pleas help urgent !! <br> send me a answer with an explanation please !
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!