Do you mean add are subtract
i will glad to help in comments
if you awnser
Answer:
1.5 times
Step-by-step explanation:
450=30 minutes
450*2=900=60 minutes
150=15 minutes
150*4=600=60 minutes
900/600=1.5 times
Answer:

Step-by-step explanation:
The perimeter is two times width plus two times length:

There is no way to simplify further.
4y-6y+10
10y+10
COMMENT FOR A BETTER EXPLAINATION
Answer:
$23,700
Step-by-step explanation:
The compound interest formula can be helpful for this. Fill in the given values and solve for the unknown.
FV = P(1 +r/n)^(nt)
where r is the annual interest rate, n is the number of times interest is compounded in a year, t is the number of years, P is the amount invested, and FV is the future value of that investment.
$27,000 = P(1 +0.022/365)^(365·6) = 1.1411037P
P ≈ $23,700