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pav-90 [236]
3 years ago
13

Simplify the expression (4 + 5i)(4 - 5i).16 - 20i16 + 20i-941​

Mathematics
1 answer:
AnnZ [28]3 years ago
3 0

Answer:

The answer i got was 41. i just took a test with the same problem and it was correct. Hope this helps.

Step-by-step explanation:

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Given sin y = -4/5, where π < y < 3π/2, and cos x = 12/13, where 0 < x < π/2. Find the exact value of sin (x - y).
konstantin123 [22]

Answer:

Solution given:

sin y = -4/5

p/h=4/5

p=4

h=5

b=√{5²-4²)=3

cos y = b/h=-3/5

again

cos x=12/13

b/h=12/13

b=12

h=13

p=√(13²-12²)=5

sin x=p/h=5/13

now

sin[x-y]=sinxcosy-cosxsiny

=5/13×-3/5-(12/13×-4/5)=33/65 is your answer.

3 0
3 years ago
The sum of two consecutive Integers are 199. Find the Integers
Yanka [14]

Answer:

99 and 100.

Step-by-step explanation:

Let's say the lower number is x. This means that the bigger number would be x+1

x+x+1=199

Simplify

2x+1=199

Subtract 1 on each side of the equation to isolate 2x:

2x=198

Divide

x=99

Let's put this to the test! The lower number(x) is 99, and the bigger number(x+1) would be 100. The total is 199.

Happy learning!

--Applepi101

6 0
3 years ago
A team t-shirt costs $3 per adult and $2 per child. On a certain day, the total number of adults (a) and children (c) who bought
svlad2 [7]
75 adults, 25 children

4 0
4 years ago
What is the area for the triangle??
sergejj [24]
96 units squared

The formula for area:
A = (1/2)bh
Area = (1/2) times base times height
8 0
4 years ago
Read 2 more answers
PLEASE HELP BIG FINALS TEST
STatiana [176]

Step-by-step explanation:

3x+8=5x+4( congruent side of ∆Abc and qrp

8-4=5x- 3x

4= 2x

4/2=x

2= x

now, replace value of Ab

3x+8

3*2+8

6+8

14

length of ab =14

7 0
3 years ago
Read 2 more answers
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