You put $400 in an account. the account earns $18 simple interest in 9 months. what is the annual interest rate?

6%

Step-by-step explanation:

Let's start by finding the amount earned per month:

=2

Now let's find the % per month

, or .5%

Now let's multiply by 12 months to get the annual interest rate

or 6%

the first one is x^2+2x+2

the second one is x^2+4

the last one is x^2-4x+8

25/6

step-by-step explanation:

you multiply 4 by the denominator (4*6=24) and add it to the numerator which makes it 25/6.