Solve for x.
really beed help before my final!!!!

Answer:
√19 or 4.36
Step-by-step explanation:
Since one leg is missing, you need to use Pythagorean theorem for this.
The hypotenuse is known so,
c² - a² = b²
c = 10
a = 9
b = ?
10² - 9² = b²
100 - 81 = b²
19 = b²
b = √19