#### Answer

a. $109.4$
b. $10.4$
c. $-11.1$
d. $-7.2$

#### Work Step by Step

a.
Write formula
$F=\frac{9}{5}C+32$
Plug values into formula
$m=\frac{9}{5}(43)+32$
Multiply
$m=77.4+32$
Add
$m=109.4$
b.
$F=\frac{9}{5}C+32$
$n=\frac{9}{5}(-12)+32$
$n=-21.6+32$
$n=10.4$
c.
$F=\frac{9}{5}C+32$
$12=\frac{9}{5}p+32$
$-20=\frac{9}{5}p$
$\frac{-20}{\frac{9}{5}}=\frac{\frac{9}{5}p}{\frac{9}{5}}$
$-11.1=p$
d.
$F=\frac{9}{5}C+32$
$19=\frac{9}{5}q+32$
$-13=\frac{9}{5}q$
$\frac{-13}{\frac{9}{5}}=\frac{\frac{9}{5}q}{\frac{9}{5}}$
$-7.2=q$