12. is a :) hope this helps
Answer:
tan 90=cos 80=sin 70 =sec 60
Answer:
The value is 
Step-by-step explanation:
From the question we are told that
The population mean is 
The proportion is 
The value considered is 
Generally given that the speed measurement is normally distributed we have that
Generally
Hence
Answer:
x = 12
Step-by-step explanation:
We know that the total angle measure of a triangle is 180 degrees, so the sum of all the angles should be 180 degrees.
Therefore, we can add all the angles, set them equal to 180 and solve for x
2x+5 + 6x-5 + 7x = 180
We can combine all the x terms and all the numerical terms on the left side of the equation to get:
(2x+6x+7x) + (5-5) = 180
15x = 180
Then we can divide both sides by 15 to isiolate x
15x = 180
x = 180/15 = 12
