currently, hayley is one-fifth as old as her brother nathan. 4 years from now 3 times hayleys age will equal nathan's age. how old is nathan now

The parabola opens: y=√x-4 (principal square root) up down right left

Which of the expressions (on the photo document i inserted) together represent all solutions to the following equation? 8cos(12x)+4=-4 *the answer should be in degrees.* > i would like for someone to explain the process to find the solutions for this.

Evaluate the expression. (9 + 5)(3 + 2)0