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FromTheMoon [43]
4 years ago
9

Find the reference angle.

Mathematics
1 answer:
valentina_108 [34]4 years ago
5 0
The reference angle must be in Q I.  That would be pi/4.
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What are the correct answers?
Delvig [45]
1. y= -x - 15
2. y= -4x + 1/2
3. y= 2x + 1
4. y= 2/3x + 3
5. y= -1/2x - 4
6. y= -3x + 13

Glad I could help
8 0
3 years ago
I need help with this
bekas [8.4K]
Could you tell me that website? I think I know the answers
5 0
3 years ago
A CD usually sells for $15.00. If the CD is 10% off, and sales tax is 5%, what is the total price of the CD, including tax?
dybincka [34]

Answer:

<em>The total price of the CD is $14.18</em>

Step-by-step explanation:

<u>Percentages </u>

We can compute additive or subtractive percentages by using these formulas. If we have a number X and want to increase it by Y%, then the increase is xY/100. Thus the new value for the number is x+xY/100 or equivalently

X(1+Y/100)

If we want to decrease by Z%, the new value is

X(1-Z/100)

The regular price for a CD is X=$15. The CD is Z=10% off, so the sale price is

15(1-10/100)=\$13.5

But we have to add the tax of Y=5%, so the final value is

13.5(1+5/100)=\$14.18

The total price of the CD is $14.18

5 0
3 years ago
Bad gums may mean a bad heart. Researchers discovered that 81% of people who have suffered a heart attack has periodontal diseas
IgorC [24]

Answer:

0.405 or 40.5%

Step-by-step explanation:

Let event A=having a periodontal disease

event B=having a heart attack

we are given

P(A)=P(having a periodontal disease)=0.30

P(B)=P(having a heart attack)=0.15

P(A/B)=P(have a periodontal disease/have a heart attack)=0.81

P(B/A)=P(have a heart attack/have a periodontal disease)=?

P(A/B)=P(A∩B)/P(B)

P(A∩B)=P(B)*P(A/B)=0.15*0.81=0.1215

P(B/A)=P(A∩B)/P(A)=0.1215/0.3=0.405

There is 40.5% probability that if someone has periodontal disease will have a heart attack.

7 0
3 years ago
Wat is thy square root of 4761
deff fn [24]

Answer:

69

Step-by-step explanation:

69 squared is 4761

7 0
3 years ago
Read 2 more answers
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