Answer:
Well for Part A-
List the temperatures from least to greatest; anything under 0 degrees is the lowest.
-6.1
-2.5
-0.4
3.4
And for Part B-
You can use a number line to order the temperatures because it's a good way to sort which ones are the lowest and highest easily.
Answer:15
Step-by-step explanation:
5x=40 (replace x by-5)
(5*-5)+40
=-25+40
=15
This can be solved in several ways. First with the basic trigonometry identity of tangent and sine (or cosine)
tanα=opposite side/adjacent side...
tanα=20/3
α=arctan(20/3)
Then sinα=h/x
x=h/sinα where α found above and h=20m:
x=20/sin(arctan(20/3)) meters
x≈20.22m (to nearest one-hundredth of a meter)
...
We could also use the Pythagorean Theorem which is easier for this problem...
x^2=h^2+d^2
x^2=20^2+3^2
x^2=400+9
x=√409 meters
x≈20.22 meters...
...
We could also use the Law of Cosines:
x^2=a^2+b^2-2abcos90 (-2abcos90=0 so we essentially get what we just did above)
x^2=a^2+b^2
x^2=409
x=√409
x≈20.22 meters
Answer:
564576676676674693963699338283853