31/177 is the answer I’m pretty sure
For which variable?
solve for y
y=x+30
solve for x
x=y-30
Hope this helps:)
D. Neither congruent nor similar.
Formula of simple interest rate: I=PxRxT
I=52$
P=400$
R=?
T=1 year
I=PxRxT
I/P/T=R
52/400/1=R
13%=R
The interest rate was 13% per year.