Answer:
We use cosine rule also called cosine law which states
c^2=a^2+b^2-2abcosC
given
a=8cm, b=7cm, c=9cm cos C?
9^2=8^+7^2-2*8*7 cos C
expand
81=64+49-112 cos C
like terms together
81-113=-112 cos C
-32=-112cos C
multiply both sides by -1
32=112cos C
divide both sides by 112
32/112=cos C
cosC=0.2857
find cos inverse of 0.2857
angle C= 73.40
The slope is gonna be 3
the equation will be y=3x+20
Answer:
7x+y=0
x+6y=5
x+y=0
Step-by-step explanation:
X=2.412 is the correct answer
"Better to have loved a short man than never to have loved a tall".
