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ehidna [41]
3 years ago
14

Choose the correct statement!

Mathematics
2 answers:
Xelga [282]3 years ago
7 0
I think the answer is D or B because i believe the lines are perpendicular
likoan [24]3 years ago
3 0

Answer:

i think it is c but i am not for sure hope that helps

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Can anyone help me with trig identities?
nevsk [136]

Answer:

cosA = √(21/25)

Step-by-step explanation:

We know

sin²(A) + cos²(A) = 1

Next, we know that sin(A) = 2/5. Plugging that into our equation, we get

(2/5)² + cos²A = 1

4/25 + cos²A = 1

subtract 4/25 from both sides to isolate cos²A

cos²A = 1 - 4/25 = 25/25-4/25 = 21/25

square root both sides to get

cosA = √(21/25)

We do not include -√(21/25) in our possible answer for cosA because this is in quadrant 1, so cosA must be positive.

6 0
3 years ago
How do you write the terminating decimal for 3/4
Veronika [31]

Answer:

3/4= 0.75

Step-by-step explanation:

Divide #3 by #4 to get 0.75

3 0
3 years ago
Write a verbal statement that represents the expression 4 + k.
jolli1 [7]
The sum of four and a number
7 0
3 years ago
Read 2 more answers
O triplo de um mumero somado a 9 e igual a 30 .qual e esse numero
-Dominant- [34]
Do you think than i ve understood it right 

3x+9=30

3x=21

x = 21/3 = 7

x = 7

hope helped 
7 0
4 years ago
What’s the measures of the indicated angles
34kurt

Answer:

hope the attached picture gives the answers

6 0
3 years ago
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