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natali 33 [55]
3 years ago
14

Simplify and show your work -8 + 4i / 4 - 4i

Mathematics
1 answer:
zhenek [66]3 years ago
7 0
=  ( -8 + 4i ) / (4 - 4i ) = 4(-2 + i )  /  4( 1- i ) = ( -2 + i )  /  ( 1 - i )
=  (i  - 2  )(-i +1)^-1
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+(-6) + (-8)= -4<br> What’s the missing number???
Darya [45]

Answer:

10

Step by step explanation:

In general, if we have an equation that has just one variable, such as x, then "solving the equation" means finding the set of all values that can be substituted for the one variable to produce a valid equation.

Isolate "x" on one side of the algebraic equation by adding the negative number that appears on the same side of the equation as the "x." For example, in the equation "x - 5 = 12", rewrite the equation as "x = 12 + 5" and solve for "x."

x + (-6) + (-8) = -4

x + (-6 + -8) = -4

x + (-14) = -4

x + (-14 + 14) = -4 + 14

x = 10

5 0
3 years ago
The length of a rectangle is stored in a double variable named length, the width in one named width. Write an expression whose v
myrzilka [38]

Answer:

Answered

Step-by-step explanation:

Length is stored in variable named length

the width in one named width

the expression for the diagonal of the rectangle can be written as

double diagonal = Math.sqrt(Math.pow(length,2) + Math.pow(width,2))

8 0
3 years ago
A man drops a ball from the top of a 300 foot cliff. The height of the falling ball is modeled
netineya [11]

Answer:

The ball reaches 44 ft above the ground after 4 sec.

Step-by-step explanation:

Set h(t)=-16t^2+300 equal to 44 feet and solve for time, t.  Indicate exponentiation with " ^ "

-16t^2 + 300 = 44 becomes

-16t^2 + 256 = 0, or 16t^2 = 256.  Then, taking the square root of both sides, we get:

4t = 16, or t = 4 sec.  The ball reaches 44 ft above the ground after 4 sec.

5 0
3 years ago
Which of the following sets of numbers could not represent the three sides of a triangle?
maw [93]

Answer:

It would be {10, 16, 27}, {12, 27, 39}, {8, 22, 31} that DO NOT represent 3 sides of a triangle

Step-by-step explanation:

Since the only answer where the first 2 numbers is greater than the 3rd/last number is {14, 28, 39} (which makes it the only traingle), the others would ALL NOT be triangles.

7 0
3 years ago
Read 2 more answers
Solve for a.<br><br> A= ?????
Degger [83]

Answer:a=3√7

Step-by-step explanation:

c=12

b=9

a=?

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

c²=a²+b²

a²=c²-b²

a=√c²-b²

a=√12²-9²

a=√144-81

a=√63

a=3√7

7 0
3 years ago
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