Could I get some help?

mario paid 15,000$ for his car

$15,000

Step-by-step explanation:

This is basic proportions.

We are given that 9000=60%

Therfore 100%=X.

Using the formula of proportions, we can calculate (9000*100)/60

This gives up 15000

Therfore he paid $15,000 for his car, which is 100% of the price.

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  

entering that problem on the tube might get you an answer