Answer:
a = 3
Step-by-step explanation:
a^2 + 4^2 = 5^2
Step 1 square all exponents
a^2 + 16 = 25 4*4 = 16 and 5*5 = 25
Step 2 subtract 16 from both sides
a^2 +16 = 25
-16 -16
a^2 = 9
Step 3 square root both sides
a = 3 square root of 9 is 3
Hope I helped!!
