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
sergejj [24]
3 years ago
5

Express (2-I) - (-1+3i) in the form of a + ib.

Mathematics
2 answers:
oksian1 [2.3K]3 years ago
7 0

Answer:

=3-4i

Step-by-step explanation:

So we have:

(2-i)-(-1+3i)

First, distribute:

=(2-i)+1-3i

Combine like terms:

=-i-3i+2+1

Add:

=-4i+3

So, in the a+bi format, we will have:

=3-4i

BartSMP [9]3 years ago
6 0

Answer:

3 -4i

Step-by-step explanation:

(2-i) - (-1+3i)

Distribute the minus sign

(2-i) + 1-3i

Combine like terms

3 -4i

You might be interested in
Name the slope and one point that is on the line
Alekssandra [29.7K]

Answer: Choice A

m = undefined

point (-2,5)

==================================================

Explanation:

The equation x = -2 describes a vertical line in which every point on this line has x coordinate -2. Two points on this line are (-2,0) and (-2,1)

Another point on this line is (-2,5) since this also has x coordinate -2.

------------------

All vertical lines have undefined slope.

Let's pick two points such as (-2,0) and (-2,1) and find the slope through them

m = (y2-y1)/(x2-x1)

m = (1-0)/(-2-(-2))

m = (1-0)/(-2+2)

m = 1/0

m = undefined, since we cannot divide by zero.

7 0
3 years ago
For a circle of raduis 6feet, find the arc length of a central angle of 6
murzikaleks [220]
Length of a circumference=2πr
r=radius=6 feet.
lengt of this circumference=2π6 feet=12π feet.

1 circumference=360º; then:

360º-------------------12π feet
6º----------------------    x

360º * x=6º * 12π feet
x=(6º * 12π feet) / 360º=π/30  feet (≈0,105 feet).

Solution: π/30 feet
4 0
3 years ago
Please help! It would be appreciated ! :)
Katarina [22]

Step-by-step explanation:

(x-9)²

= (x-9)(x-9)

= x²-9x-9x+81

= x²-18x+81

5 0
3 years ago
Can anyone help me with this? i dont understand it, thank you.
valina [46]

Answer:

3(x + 2) = 2(x + 2) \\ 3x + 6 = 2x + 4 \\ 3x - 2x = 4 - 6 \\ x =  - 2

4 0
2 years ago
If you are 600 m from a batter when you see him hit a ball, how long will you wait to hear the sound of the bat hitting the ball
Molodets [167]

Answer:

<em>The speed of sound at 20°C is 343.42 m/s.</em>

<em>You have to wait 1.75 seconds to hear the sound of the bat hitting the ball</em>

Step-by-step explanation:

<u>Speed of Sound</u>

The speed of sound is not constant with temperature. Generally speaking, the greater the temperature, the greater the speed of sound.

The approximate speed of sound in dry air at temperatures T near 0°C is calculated from:

\displaystyle v_{\mathrm {s} }=(331.3+0.606\cdot T )~~~\mathrm {m/s}

The air is at T=20°C, thus the speed of sound is:

\displaystyle v_{\mathrm {s} }=(331.3+0.606\cdot 20 )~~~\mathrm {m/s}

v_{\mathrm {s} }=343.42\ m/s

The speed of sound at 20°C is 343.42 m/s.

To calculate the time to hear the sound after the batter hits the ball, we use the formula of constant speed motion:

\displaystyle v=\frac{d}{t}

Where d is the distance and t is the time. Solving for t:

\displaystyle t=\frac{d}{v}

Substituting the values v=343.42 m/s and d=600 m:

\displaystyle t=\frac{600}{343.42}

t = 1.75 s

You have to wait 1.75 seconds to hear the sound of the bat hitting the ball

6 0
3 years ago
Other questions:
  • What is statistics?
    14·1 answer
  • Talia wants to write the equation of the graphed line in point-slope form. These are the steps she plans to use: Step 1: Choose
    9·2 answers
  • Solving Exponential and Logarithmic Equation In exercise,solve for x or t.See example 5 and 6.
    9·1 answer
  • Is this relationship a function?
    9·1 answer
  • 11+4+x=x+9. kaksjdjdbdjjdjdbdbd
    14·1 answer
  • Select the correct answer.
    9·1 answer
  • Plzzzz help Ik it’s a lot but I’m literally stuck and can’t figure anything out
    6·1 answer
  • Find the slope of the line containing the points (7,5) and (2, 4).
    13·2 answers
  • What is 1/2, 3/4, and 5/48 ordered least to greatest
    5·2 answers
  • What is the length of the hypotenuse of the triangle?
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!