Expand the following: a) \( 2(x+3) \) b) \( 5(2 x-4) \) c) \( 4(2 x+1) \) d) \( 6(x-4 y) \)

3. The greater of two numbers is one less than 8 times the smaller. Their sum is 98 . Find the numbers.

Part A A tie-dye kit with one T-shirt costs \( \$ 15 \). Each additional T-shirt costs \( \$ 4 \) more. Choose the explicit formula to represent the situation. A. \( a_{n}=11+4 n \) B. \( a_{n}=4+15 n \) Cl. \( a_{n}=19+4 n \) Kids

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

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.