Answer:

Step-by-step explanation:
Given



Required
Determine the length of LS
Since H is between L and S, then

Substitute 14x - 21 for LS, 15 for LH and 8x for HS

Collect Like Terms


Divide both sides by 6

Substitute 6 for x in 



<em>Hence, the length of LS is 63 units</em>
Answer:
C 9s-8t
Step-by-step explanation:
A linear expression is an algebraic expression in which each term is either a constant or the product of a constant and (the first power of) a single variable. Linear expression can have one or more variables.
If you're asking how to simplify, then this is how you do it.
when a power meets another power but in brackets, then you have to multiply the powers. ¼ × 4 would be 1. i simplified 81 to 3⁴.
Answer:
The answer is 3
Step-by-step explanation:
I put the answer simplified if needed.