a) the cost of the house is 96000 and the down paidment is the 20% so we can use a rule of 3 to solve it so:
[tex]\begin{gathered} 96000\to100 \\ x\to20 \end{gathered}[/tex]so the equation will be:
[tex]\begin{gathered} x=\frac{96000\cdot20}{100} \\ x=19200 \end{gathered}[/tex]b) her income is $4000 so the 28% will be:
[tex]\begin{gathered} 4000\to100 \\ x\to28 \end{gathered}[/tex]so the equation will be:
[tex]\begin{gathered} x=\frac{4000\cdot28}{100} \\ x=1120 \end{gathered}[/tex]c) the equation that models a loan is:
[tex]C=\frac{P\cdot(0.095\cdot(1+0.095)^n)}{(1+0.095)^{25}-1}[/tex]So we replace the princeiple and find monthly paidment.
[tex]\begin{gathered} C=\frac{76800\cdot(0.095\cdot(1.095)^{25}}{8.67} \\ C=\frac{76800\cdot0.92}{8.67} \\ C=\frac{70540.30}{8.67} \\ C=8136.14 \\ C\approx8136 \end{gathered}[/tex]d)The total monthly paidment will be:
[tex]\begin{gathered} T=8136+\frac{1300}{12}+\frac{336}{12} \\ T=8136+108.33+28 \\ T=8272.33 \\ T\approx8272 \end{gathered}[/tex]SOo the answer is NO she can't afort to buy this house