e) \( 6(2 x+7)-13=21-9(x+1) \) \( 12 x+42-13=21-9 x+9 \) \( 12 x-13=21-9 x+9 \) \( 12 x=x 21-9 x+9-42 \)

Find \( (5 x+4)+(-8 x-2) \)

Find \( (8 x+9)+(-6 x-2) \)

Find the zeros of the following quadratic function using the square ro method. What are the \( x \)-intercepts of the graph of the function? \( F(x)=(2 x+9)^{2}-80 \)

Tentukan kecerunan dan pintasan-y bagi garis lurus berikut (a) \( \quad y=4 x+6 \)

\( T=2 \pi \sqrt{\frac{L}{32}} \) Where \( L \) is the length, in feet, of the pendulum, and \( \pi \) is approximately \( \frac{22}{7} \). How long must the pendulum be of one complete cycle takes 8 seconds? Answer as a fraction or round to at least 2 decimal places.