Answer:

Step-by-step explanation:

Add 3 to both sides

Simplify

Add
to both sides

Simplify

Divide both sides by 6

Simplify

2 1/7 is a mixed number BUT it is also a rational number.
Turning this into a improper fraction, you'd get 15/7
15/7 = 2.14285...
Repeating decimals are rational numbers
Answer:

Step-by-step explanation:

35 divided by 2.5 is 14, so she biked 14 miles in 1 hour. So 14*3= 42
She can bike 42 miles in 3 hours.
Answer: 4
Step-by-step explanation:
Perpendicular lines have reciprocal slopes