Answer:
8.65 miles
Step-by-step explanation:
The total of his short runs are 9.35 so you need to find out how many miles he has left till he reaches 18 miles.
The equation you can use is 9.35 + x = 18 x will equal the number of miles for the long run.
9.35 + x = 18
to isolate x you will subtract 9.35 from both sides.
you will get:
x = 8.65
8.65 miles
One month = 5000
Number of months before the spark plugs need to change :
15000 ÷ 5000 = 3
The sparks can last 3 months before it needs to be changed.
Number of times it need to change in a year = 12 ÷ 3 = 4
-----------------------------------------------------------------------------
Answer : It needs to be change 4 times a year.
-----------------------------------------------------------------------------
Do I have to do all of them?
Answer: I guess b I don’t really know hope you get better help
Step-by-step explanation:
Answer:
7
Step-by-step explanation:
x equals a certain number
3x - 2 = 19
add 2 both sides
3x=21
divide 3 both sides
x=7
