Answer:
36
Step-by-step explanation:
Given
m² - 2mn + n² , substitute values
= (- 2)² - 2(- 2)(4) + 4²
= 4 - 2(- 8) + 16
= 4 + 16 + 16
= 36
200 miles
16+ 0,12m=40
0,12m=24
Divide both sides by 0,12
m=200
0,12x200=24
24+16=40
6x if not its 3x2=6+180= 186x
6, and 15 is 30
2, 9, and 15 id 54 plz mark me as brainliest
HOPE THIS HELPS!!!!!!! ;-)
Assuming all angles are to be calculated.
Using the cosine rule:
a^2=b^2+c^2-2bc(cos(A))
=>
cos(A)=(b^2+c^2-a^2)/(2bc)
substitute values,
cos(A)=(17^2+19^2-22^2)/(2*17*19)=83/323=0.25697
A=75.11 degrees
similarly
cos(B)=(19^2+22^2-17^2)/(2*19*22)=139/209=0.66507
B=48.31 degrees
cos(C)=(22^2+17^2-19^2)/(2*22*17)=103/187=0.55080
C=56.58 degrees
Check: (75.11+48.31+56.58)=180.00 degrees, ok.
Note:
1. Better accuracy than required is calculated for a more accurate check. You need to round answers to the specified accuracy.
2. In fact, not all tables are made from formulas. Some tables are compiled by experimentation and require hundreds and thousands of man-years to complete (e.g. steam tables).
