Step-by-step explanation:
Get the value of y first from the first equation.. Replace the value of y on the second equation to get the value of x
Answer:
We conclude that eighty percent of bike tires last at most 14.4 months.
Step-by-step explanation:
We know that a pair of bike tires can last 18 months if used every day.
We calculate how much eighty percent of the tire will last in months.
We have the following proportion:

We conclude that eighty percent of bike tires last at most 14.4 months.
Answer:
Its 10
Step-by-step explanation:
10+10=20 so 20/2 is 10
Answer:
-5
Step-by-step explanation:
2x+3=-7
2x=-7-3
2x=-10
x=-10/2
x=-5