Answer:
Chan is not correct.
The correct equivalent quarterly interest rate is 1.3108% per quarter.
Step-by-step explanation:
Given that Chan deposited money into his retirement account.
The interest was 7% compounded annually.
Let P be the amount invested and F the final amount got after 1 year
If compounded annually,
F = P(1+0.07) = 1.07P
If compounded quarterly, no of quarters = 4
F = 
= 1.3108P
Hence equivalent interest rate = 1.3108% and not 2%
You're meant to make one side of the equation equal 0.
For example, the first problem is

+ 9k = -7
You'd add 7 to both sides, leaving you with

+ 9k +7 =0
And I assume you know how to factor??
I hope this helps you
4z+2.z-4.2=3z+11
4z-3z+2z=11+8
3z=19
z=19/3
one solution
3 times: Rate, Rate of change and Slope.