5. Five times the sum of a number and three is the same as the number minus one. Find the number.

Use substitution to solve the system. \[ \begin{array}{c}3 x+5 y=-7 \\ 3 y+7=x\end{array} \]

a. \( (f \circ \mathrm{~g})(\mathrm{x})=\frac{23-2 \mathrm{x}}{5 \mathrm{x}-19} \) (Factor completely. Simplify your answer.) What is the domain of \( \mathrm{f} \circ \mathrm{g} \) ? Select the correct choice below and, if necessary, fill in the answer box to complete your cho (Use a comma to separate answers as needed. Use integers or fractions for any numbers in the expression.) B. The domain is all real numbers.

\( 71 + [ - 5 x + ( - 2 x + 3 ) ] = 25 - [ - ( 3 x + 4 ) - ( 4 x + 3 ) ] . \)

Solve for \( w \) \[ 3 w^{2}+12 w=0 \]

c. \( (f \circ f)(x)=\frac{-2 x-15}{5 x+13} \) (Factor completely. Simplify your answer.) What is the domain of \( f \) of? Select the correct choice below and, if necessary, fill in the answer box to complete your choice A. The domain is \( \left\{x \mid-4,-\frac{13}{5}\right\} \). (Use a comma to separate answers as needed. Use integers or fractions for any numbers in the expression.) B. The domain is all real numbers.