5x + 6 + (-7x - 4)
5x + 6 - 7x - 4
-2x + 2
D.) y= 0.3x
This is because slope is change in y over change in x, so we get 3/10 which is equivalent to 0.3
2x+5y=21, x+y=3
y=3-x
2x+5y=21
2x+5(3-x) =21
2x+15-5x=21
2x-5x+15=21
-3x+15=21
-3x=21-15
-x=6/3
-x=2
x=-2
Answer:
The groups walking speed is
or 
Step-by-step explanation:
we know that
To find the speed divide the distance by the time
so

Convert to mixed number
