According to the empirical rule, about 68%
I hope this helps you
-4y-3x= -11
-2x+4y= -34
-4y-3x-2x+4y= -11-34
-5x= -45
x=9
9-2y=17
y= -4
30 degrees. A triangle is 180. The right angle is 90.
90=7x-10+3x
add ten to both sides and combine like terms
100=10x simplify
10=x now substitute
3x
3(10)=30
2.5*6.4=16, 2.5*4.8=12. 12+12+16+16=56