Answer:
<h2>x = 10.3</h2>
Step-by-step explanation:
Use sine.

We have:

<em>look at the table in the picture</em>
Substitute:
<em>multiply both sides by 16</em>

Answer: 56 mph
Step-by-step explanation:
48 miles x 2 hours = 96 miles
60 miles x 4 hours = 240 miles
240 + 96 = 360 total miles
360 / 6 (hours) = 56 mph
The answer should be (7x+1)(7x-1)
Given

subject to the constraint

Let

.
The gradient vectors of

and

are:

and

By Lagrange's theorem, there is a number

, such that


It can be seen that

has local extreme values at the given region.