hey friend it is Observational study because it says that her records hourly temperature over the course of several years in order to make a decision(variations) or to analyse his experiments. ;)
Answer:
Y=70
X= 20
You do first the adjacent angles 180-40 so 140 then u have that the triangle is isosceles so the bas angles are equal 180 -140 = 40
40 divided by 2 20 and 20 so x= 20
Then 90 -20 is 70
So 180 - (70+40)
180-110=70 so y= 70
Hope you understand
-2976 use formula a_1 + (n-1)d n = term number ( in this case 1000)
Well, 1/5 would mean dividing both width and height by 5. Do that... then times new answer by 4 to get 4/5.
So...
20/5 = 4*4 = 16 in wide
15/5 = 3*4 = 12 in high
Hope this helps! :)
