What is 7k - 1.2=-19.8
^
it is a subtraction.
sign
-19.8 is a negative number btw

Ernest is purchasing a $175,000 home with a 30-year mortgage. he will make a $15,000 down payment. use the table below to find his monthly pmi payment.

Solve 2x+y=3 x+y=5 in substitution method

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).