2
By definition, a quadratic equation has 2 as the highest degree. If a variable is cubed, then the quadratic formula is not applicable.
5, 10, 15, 20, 5n, 470
You just need to multiply the value by 5.
Answer:
Step-by-step explanation:

What i did is that i did $1.50 time 8 = $12.00 and then do $30.00-12.00=$18.00
Answer:
$53.30
Step-by-step explanation:
61.43-21.75=39.68 is the cell phone bill in July.
39.68+13.62= 53.30 is the phone bill in June.