$9.$ Represent each situation as an integer expression, and then solve.

a$.$ A football team loses $7$ yd on each of $3$ consecutive plays. What is the team's total loss in yardage?

b$.$ An airplane descends at a rate of $\backslash (650\backslash$mathrm$\{$ft$\}/\backslash$mathrm$\{$min$\}\backslash ).$ If the airplane is in this descent for $12$ min $,$ how far does it descend?

c$.$ The temperature at midnight was $\backslash (-12^\{\backslash$circ$\}\backslash$mathrm$\{$F$\}\backslash ).$ If the temperature increases at a rate of $\backslash (4^\{\backslash$circ$\}\backslash$mathrm$\{$F$\}/\backslash$mathrm$\{$hr$\}\backslash ),$ what will the temperature be at $8$:$00$ a$.$m$.?$

d$.$ A stockbroker makes a bad investment and loses $\backslash (\backslash$$ $365\backslash )$ dollars a day on a certain stock. If it takes a week for him to sell, how much money has he lost?