9+12>18
12+18>9
9+18>12
So, yes. A triangle can be formed by the given angles.
Answer:
you save 1.70 and spend 15.30
Step-by-step explanation:
5x+4y=8
-5x from both sides, you get 4y=-5x+8
then you divide the equation by 4.
y=-5/4x+2
10x-4y=46
-10x from both sides and you get -4y=-10x+46
divide the whole equation by -4 and you get y=5/2x + -23/2 .
source: MathPapa
(9*2)+(x*2)=48
18+2x=48
2x=30
x=15
X^2 would be substituted, (4/5)^2 so square them 16/25