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
Anvisha [2.4K]
2 years ago
7

Help for question 7 please

Mathematics
2 answers:
Gelneren [198K]2 years ago
8 0
Remember that i² = -1. Your expression can be rewritten as
  -3×*(i²)² +2i×(i²) +2×(i²) +√(9×(i²))
  = -3×(-1)² +2i×(-1) +2×(-1) +√((3i)²)
  = -3 -2i -2 +3i
  = -5 +i . . . . . . . . . . . . matches the 1st selection
scoray [572]2 years ago
7 0
◆ COMPLEX NUMBERS ◆

given \: expression \: is \: - \\ \\ - 3 {i}^{4} + 2 {i}^{3} + 2 {i}^{2} + \sqrt{ - 9} \\ \\ we \: know \: that \: , \: \\ i = \sqrt{ - 1} \\ \\ {i}^{2} = - 1 \\ \\ {i}^{3 } = - i \\ \\ {i}^{4} = 1 \\ \\ \\ - 3 {i}^{4} + 2 {i}^{3} + 2 {i}^{2} + \sqrt{9} i \\ = - 3 {i}^{4} + 2 {i}^{3} + 2 {i}^{2} + 3i \\ \\ using \: the \: above \: properties \: of \: iota \: (i) \\ \\ = - 3(1) + 2( - i) + 2( - 1) + 3i \\ \\ = - 3 - 2i - 2 + 3i \\ \\ = (- 5 + i) \: \: \: ans.
You might be interested in
Two rectangular picture frames have the same area of 45 square inches but have different side lengths. Frame A has a length of 6
Vilka [71]

9514 1404 393

Answer:

  1. the longer frame (B) has the shorter width

  2. the shorter width is 6 3/7 inches, area divided by length

Step-by-step explanation:

The relation between area, length, and width is ...

  A = LW

Then the width is ...

  W = A/L . . . . .  inversely proportional to length

__

1. Since length and width are inversely proportional (when area is constant), the shorter width will be associated with the longer length. Frame B will have the shorter width.

__

2. The width of frame B is ...

  W = A/L = (45 in²)/(7 in) = 45/7 in = 6 3/7 in

5 0
3 years ago
What is the slope of the line that contains the points (2, -6) and (-3, 1)?
jolli1 [7]
The slope would be -5 over 7
8 0
3 years ago
V-16=-32<br>I need help with the math worksheet how to solve the question
sergeinik [125]

You solve an equation like this by adding the opposite of the constant to both sides of the equation.

... V -16 +16 = -32 +16 . . . . . addition property of equality: if a=c, then a+b = c+b

... V + 0 = -16 . . . . . . . . . . . . additive inverse property of integers: -16+16 = 0

... V = -16 . . . . . . . . . . . . . . . identity element of addition: V+0 = V

_____

<em>You can always do the same thing to both sides of an equation.</em> Here, it is useful to add the opposite of -16 to both sides. That way the constant on the left becomes zero, so you only have the variable by itself—which is what you want.

8 0
3 years ago
Can someone help me please will give brainliest
wolverine [178]

Answer:

  see below

Step-by-step explanation:

Each point moves to half its previous distance from P. It is probably easier to count grid squares on the graph than it is to do the math on the coordinates.

If you're doing the math on the coordinates, it is convenient to use P = (0, 0), then multiply each of the coordinates of A, B, and C by 1/2. For example:

  A' = (1/2)A = (1/2)(8, 4) = (4, 2)

8 0
3 years ago
Aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
stellarik [79]
Finding the X-intercept.

1.) Solve for x by substituting 0 in for y.

4x+(0)=5

4x/4+5/4

x=1.25 or 1 and 1/4.
6 0
2 years ago
Other questions:
  • Ircle the letter of the correct digit. in the measurement 43.52 cm, which digit is the most uncertain?
    11·1 answer
  • Corey measure a crayon box writhing his paper clip ruler. about how long is the box
    13·1 answer
  • I need help resolving this please.<br><br> 8=4(q-2)+4
    5·1 answer
  • A shopper buys cat food in bags of 3 1/2 lbs. Her cat eats 3/4 lb each week. How many weeks does one bag last?
    11·2 answers
  • A ladder is sliding down a wall so that the distance between the top of the ladder and the floor is decreasing at a rate of 9 fe
    12·1 answer
  • Which expression is equivalent to the expression below? (m+3/m^2-16)/(m^2-9/m+4)
    13·2 answers
  • Mhanifa can answer this only
    10·1 answer
  • Algebra help please answer
    8·1 answer
  • Consider the diagram below.<br> Find the value of x<br> Enter each line of work as an equation.
    11·2 answers
  • Can we write 0 in the form of p by q?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!