4. The picture below shows a triangular shelf up for sale at Brad's shop. Brad rotates counterclockwise to show to the customer how it can be mounted in different styles.
(8x - 12)
(6x + 8)
What would be the measure of angle Zatter Brad rotates the shell?

Me with this one question, and i'll upvote the brainliest answer

Quadrilateral efgh was dilated with the origin as the center of dilation to create quadrilateral e'f'g'h'. the quadrilateral was dilated using a scale factor of 2.5. the lengths of the sides of quadrilateral efgh are given. what is the length of side f'g'?

Amass weighing 16 pounds stretches a spring 8/3 feet. the mass is initially released from rest from a point 2 feet below the equilibrium position, and the subsequent motion takes place in a medium that offers a damping force that is numerically equal to 1/2 the instantaneous velocity. find the equation of motion if the mass is driven by an external force equal to f(t)=cos(2t).