Question

1. evaluate (solve) each expression if n = 7, z = 1 and x = 4 (use substitution).

a. (10x - 3n)
b. (6z + 2n - z^4)

Explanation:

Step1: Substitute values for part a

Substitute $x=4$, $n=7$ into $10x-3n$:
$10(4) - 3(7)$

Step2: Calculate part a result

Compute multiplication then subtraction:
$40 - 21 = 19$

Step3: Substitute values for part b

Substitute $z=1$, $n=7$ into $6z+2n-z^4$:
$6(1) + 2(7) - (1)^4$

Step4: Calculate part b result

Compute terms then combine:
$6 + 14 - 1 = 19$

Answer:

a. $19$
b. $19$