## Intermediate Algebra for College Students (7th Edition)

$170$
Substitute $10$ to $x$ to obtain: $=8 + 2(10-7)^4$ Simplify within the parentheses to obtain: $\\=8+2(3)^4$ Apply the exponent. An exponent of 4 means $3$ will be multiplied to itself four times: $=8+2(3 \cdot 3 \cdot 3 \cdot 3) \\=8+2(81) \\=8+162 \\=170$