For the first two years of her mortgage Theresa was making fixed monthly payments of $1,000 per month. Her two year fixed-rate period has just ended, and now she must pay an interest rate of 6%. The amount outstanding on the mortgage is $170,000, and the mortgage will last for 28 years more. Calculate the increase in monthly payments that she must now pay.

step-by-step explanation :

we know that

the measurement of the outer angle is the semi-difference of the arcs which comprises

in this problem

m< xzy is the outer angle

substitute the values

the measure of angle xoy is equal to

> by central angle

substitute the value

-8/2y-8=5/y+4-7y+8/y^2-16

we move all terms to the left:

-8/2y-8-(5/y+4-7y+8/y^2-16)=0

we can not solve this equation