Find the length of side a.

12

=> here's your solution

=> hypotenuse = 13

=> base. = 5

=> we need to find out perpendicular

=> so, we know. h^2 = b^2 + p^2

=> now putting value in this formula

=> p^2 = 13^2 - 5^2

=> p^2 = 169 - 25

=> p^2 = 144

=> p = √144

= >> p = 12

correct answer is infinitely many solutions

step-by-step explanation:

2(2x + 3) = -4 + 2(2x + 5)

solving the above equation:

4x + 6 = -4 +4x +10

combining like terms

4x -4x = -4+10-6

0=0

since both sides are 0=0, we end up into true statement it means it has infinite many solutions.

so correct answer is infinitely many solutions