12 miles per hour This is a fraction equal to
30 miles ÷ 2.5 hours
We want a unit rate where
1 is in the denominator,
so we divide top and bottom by 2.5
30 miles÷ 2.52.5 hours÷ 2.5=12 miles1 hour=12 mileshour= 12 miles per hour
Remember
and
so
=
answer would be B if we were using x
(3 x 5) x 4
3 x 5 x 4
15 x 4
60
Start by converting your two equations into slope-intercept form.
3x - 3y = -9
-3y = -3x -9 Subtract 3x from both sides
y = x +3 Divide both sides by -3
2x + y = 9
y = -2x + 9 Subtract 2x from both sides.
Then graph both lines (in which case the point where they intersect is the solution) or substitute in each point until both equations are true.
In this case the solution is (2,5); both equations become 5=5 when you substitute in the point's coordinates.
This is simple you just need to think what minus or plus the variable in each equation (letter that represents an unknown number) equals what the equations do
No. 19 X= -8
No.20 R=10
No.21 X=0
No.22 B=7
No.23 V=-4
No.24 N=10
No.25 X=7
No.26 K=4
No.27 N=-4
No.28 X=-7