Show all work to solve the equation for x. If a solution is extraneous, be sure to identify it in your final answer. Square root x + 6 - 4 = x

Hector and alex traded video games. alex gave hector one fourth of his video games in exchange for 6 video games. then he sold 3 video games and gave 2 video games to his brother. alex ended up with 16 video games. how many video games did alex have when he started?

Given the two similar triangles, how do i find the missing length? if a=4, b=5, and b'=7.5 find a'

Aremote-controlled boat can travel at 4 feet per second in calm water. the boat traveled 48 feet with the current, and then it traveled 16 feet against the current in the same amount of time. how fast is the current?