Answer: m = 4/7
Step-by-step explanation:
x = m
y = 2m+1
so
x+3y = 7
or, m+3(2m+1) = 7
or, m + 6m+3 = 7
or, 7m = 4
so m = 4/7
Answer:
Perpendicular lines (c)
brainly.com/question/8182874
I got 23 so I am not sure sorry
4 to 6 miles an hour would be the answer