Is 3/8 percentage same as 0.375 as a decimal ?

What is the solution set of the quadratic inequality x^2-5< or equal to 0

Which of the following is the best first step in solving the equation below? 4+2㏒³x=17

1. ∠1 is complementary to ∠2 and ∠3 is complementary to ∠2. subtraction property of equality 2. m∠1 + m∠2 = 90 and m∠3 + m∠2 = 90 substitution 3. m∠1 + m∠2 = m∠3 + m∠2 definition of complementary 4. m∠1 = m∠3 given