456.29 in the answer there
should be 5 significant figures.
Answer:
(y+8) (y-3)
Step-by-step explanation:
y2+5y-24
=y2+8y-3y-24
=y(y+8)-3(y+8)
=(y+8) (y-3)
Subtract to find out how much she spent:
30 - 27.90 = 2.10
Divide that by the cost per minute:
2.10 / 0.14 = 15
The call was 15 minutes.
Answer:

Step-by-step explanation:
using form:

where a: starting number
where r: common ratio (in this case each next term is 3 times previous term)