Graph each pair of parametric equations.
x = 2t
y = t + 5, -2 ≤ t ≤ 3

Rearrange the formula c^2 = a^2 + b^2 for b

Evaluate the expression for the given value of the variable 7a - 4a for a =8

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?