-12/-9=y/-4
cross multiply
-9y=48
divide by 9 on each side
y= -5.33
Use a calculator. The sine of 78 degrees is .98.
X+y=2 (label equation one)
x-y=4 (label equation two)
y=-x+2 (equation one rearranged, label this equation equation three)
sub 3 into 2
x-(-x+2)=4
x+x-2=4
2x-2=4
2x=6
x=3
sub x=3 into equation one
3+y=2
y=-1
therefore x=3 and y=-1
What's up? the answer is 1/2
6 sides in which 3 are odd. 1,3,5
3/6 or 1/2 chance of rolling odd
