Chapter 6 - Radical Functions and Rational Exponents - 6-8 Graphing Radical Functions - Practice and Problem-Solving Exercises - Page 420: 76

$2$

In this problem, we are asked to substitute in a given value of $-1$ for $x$. $2^{3x + 4}$ = $2^{3(-1) + 4}$ Multiply first, according to order of operations: $2^{-3 + 4}$ Add the exponents: $2^{1}$ Any number raised to the power of $1$ is just the number itself: $2$