Answer:
D, John did not make a mistake!
Step-by-step explanation:
Answer:
63
Step-by-step explanation:
x = # in ones place
y = # in tens place
x + y = 9
y = x - 3
substitute:
x + x-3 = 9
2x - 3 = 9
2x = 12
x = 6
y = 3
Answer: He will walk 2 1/4 miles in an hour
Answer: I put them in order from the numbers on the picture
3.
1.
4.
2.