you want to get an oil change every 4,000 miles. how many oil changes do you get in a year driving 1000 miles a month?

a year has 12 months, driving 1000 miles a month and changing the oil every 4000 miles

let 'x' represent the number of oil changes in one year:

x=(12*1000)/4000

x=3

So 3 oil changes would be obtained throughout the year. 

q: 92 degrees

hope i ^-^

a4 - 3a2 - 1

step-by-step explanation:

step   1   :

equation at the end of step   1   :

  ((a4) -   3a2) -   1

step   2   :

trying to factor by splitting the middle term

2.1     factoring   a4-3a2-1  

the first term is,   a4   its coefficient is   1 .

the middle term is,   -3a2   its coefficient is   -3 .

the last term, "the constant", is   -1