Step by step will be helpful for me

answer:

Step-by-step explanation:

using Pythagoras theorem,

in ΔABD, using above theorem

answer:

B. x = 10

Step-by-step explanation:

Using Pythagoras theorem

hyp² = adj² + opp²

(√74)² = a² + 7²

74 = a² + 49

a² = 74 - 49

a² = 25

a = √25

a = 5

for the other triangle

b = 5

thus, x = a + b

x = 5 + 5

x = 10

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