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Alexandra [31]
3 years ago
15

I need help please and thank you

Mathematics
1 answer:
Lera25 [3.4K]3 years ago
6 0
(x,y)=(-1,8/3).
hopefully this helps :)
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Sin 70°cos 10°-cos 70°sin 10=√3/2
hoa [83]
Let a =70° and b= 10° (and a-b=70-10 =60)
We have the following trigonometric identity:

sin(a-b) = sin(a).cos(b)-sin(b).cos(a) OR:
sin(70-10) = sin70.cos10 - sin10.cos70
But sin(70-10) = sin(60) and we know that sin(60°) =(√3)/2
8 0
3 years ago
A certain drug is used to treat asthma. In a clinical trial of the drug, 21 of 250 treated subjects experienced headaches (based
lozanna [386]

Answer:

a) The test is left-tailed.

Step-by-step explanation:

a) Hypothesis testing is tagged two-tailled if the test checks for a claim in both directions (greater than and less than).

It is one tailed if it checks for a claim in only one direction (either greater than or less than). It is left-tailed of it is testing the claim in a less than direction and right-tailed if it is testing the claim in a greater than direction.

This question is to check results from a test of the claim that less than 8% of treated subjects experienced headaches. It is evidently left tailed.

Hope this Helps!!!

3 0
2 years ago
ACD = 30, Line segment AC = x + 1, Line segment CD = 2x + 2. What is x equal to? x =
Anon25 [30]

Answer:

AC+ CD = ACD

X+1 + 2X + 2 = 30

3X+3 =30

3X=30–3

3X=27

X= 27/ 3

X= 9

I'm not sure of the solution, but I solved it according to a straight line (Line segment) .

I hope I helped you^_^

4 0
3 years ago
Andrew spent 75% of his $20 allowance to go to the movies. How much did he spend? Use at least 2 strategies.
earnstyle [38]

Answer:

$15

Step-by-step explanation:

4 0
3 years ago
Need help ASAP have 30 minutes
Alexxandr [17]
7.25$ for one box of paper
Explanation: divide 14.50 by 2
6 0
3 years ago
Read 2 more answers
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