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
Alexxandr [17]
2 years ago
15

And this (4+i)(4-i) show work so i can understand pls ;-;

Mathematics
2 answers:
Andreas93 [3]2 years ago
8 0

Answer:

17

Step-by-step explanation:

(a+b)(a-b)=a^2-b^2

4^2 - i^2

16 - (-1)

17

i^2= -1

Irina18 [472]2 years ago
4 0
  • (a+b)(a-b)=a^2-b^2

\\ \tt\longmapsto (4+I)(4-i)

\\ \tt\longmapsto 4^2-i^2

\\ \tt\longmapsto 16+1

\\ \tt\longmapsto 17

You might be interested in
Which line shows the first error in the solution?
Arlecino [84]
Error
<span>6 x = - 2 (5)
should be

</span><span>2 x = - 18 (5)

answer
</span><span>D. 
Line 5</span>
3 0
3 years ago
25 Trent's watch runs at half the speed itshould. In other words, the hands on thewatch move only a half hour when an hourof tim
sergeinik [125]

Given that Trent's watch runs at half the speed it should run, this implies that

for every hour passed, his watch moves by half an hour.

Hence, for every half-hour passed, Trent's watch moves by 15 minutes.

Hence, when the real time is 10:30 am, Trent's watch will show 9:15 am.

6 0
2 years ago
At an amusement park, 10 out of 25 tickets sold were discount tickets. What percentage of the tickets were discount ticket
mezya [45]

Answer:

<h2>40% of the tickets were discount ticket</h2>

Step-by-step explanation:

10/25 are discount tickets

x by 4 to make the denominator 100

40/100

make into percentage

40%

7 0
3 years ago
When x=26 what does y=
Amiraneli [1.4K]

Answer:

this is incomplete idk what I'm supposed to do with this

6 0
3 years ago
drew bought a chemistry book for $30. later that book was marked down by 20%. what was the cost of the book with the discount?
drek231 [11]

Answer:

It would be 6 dollars

Step-by-step explanation:

20 percent of 30 dollars is 6 dollars.

If an item costs 30 dollars and it's on sale for 20 percent off, how much will you save? To figure this out, you need to find 20 percent of 30.

This is easy to do in your head. Think of what 10 percent would be. 10 percent of 30 would be the same as .10 x 30, or 3. So, 10 percent off is 3 dollars off.

20 percent is twice as much as 10 percent. If 10 percent off is 3 dollars, then 20 percent off would be 2 x 3 or 6.

20 percent of 30 dollars would be 6 dollars.

3 0
3 years ago
Other questions:
  • 81 divided by 3d =50 which is the bold number A product B quotient C dividend D divisor
    9·1 answer
  • Write the equation of a line with a slope of 5 that passes through the point (3,1)
    10·1 answer
  • 9. What are the coordinates of the vertices of the polygon in the graph that are in Quadrant 117
    12·1 answer
  • What is the equivalent ratio for 4:3?
    5·1 answer
  • M=2 can some one help me I need to evaluate the expression it says hint substitute m for 2
    14·1 answer
  • A baseball bat cost $28. There is a 25% discount. How much will you pay after the discount?
    7·2 answers
  • Find the slope between the points (-3, -5) and (7, -1)
    6·2 answers
  • When subtracting a negative, on the number line you move right or left?
    15·1 answer
  • Find the value of each angle.​
    5·1 answer
  • What are all the fractions that are between 1/2 and 1.
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!