Question

Please answer correctly !!!!!!!!!!!!! Will mark Brianliest pleaseeeee !!!!!!

Answer 1

Answer:

2sqrt(10)

Step-by-step explanation:

Use the Pythagorean theorem.

x^2 + 3^2 = 7^2

x^2 + 9 = 49

x^2 = 40

x = sqrt(40)

x = 2sqrt(10)