Answer:
x=2
Step-by-step explanation:
5x−1=2x+5(Possibility 1)
5x−1−2x=2x+5−2x(Subtract 2x from both sides)
3x−1=5
3x−1+1=5+1(Add 1 to both sides)
3x=6
3x
3
=
6
3
(Divide both sides by 3)
Go to a website called Mathpapa. It is an algebra calculator and it solves it for you
I want to preface this by saying I don't have the answer. I haven't taken linear algebra yet. If someone here does know the answer, by all means, their answer should supersede mine. But... if
![A= \left[\begin{array}{ccc}-2&-1&0\\0&1&3\\1&1&6\\2&1&-12\end{array}\right]](https://tex.z-dn.net/?f=%20A%3D%20%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D-2%26-1%260%5C%5C0%261%263%5C%5C1%261%266%5C%5C2%261%26-12%5Cend%7Barray%7D%5Cright%5D)
then here is an outline of how to determine whether the columns form a linearly independent set.
Ok so we know that brian took 30 seconds to finish the race, but we don't know how long seth took. The problem told us the race was 200 yards and that seth ran 25 feet per second. From those two pieces of information, we can figure out how many seconds it took seth to run 200 yards. Since the problem told us he ran 25 FEET per second, we will convert the length of the track from yards to feet. There are 3 feet in a yard, so the track is 600 feet. Since he ran 25 feet per second, if we divide the length of the track by the speed he ran, we will get how long it took him to run. So 600 divided by 25 will give us 24 seconds. So Brian ran the race in 30 seconds and Seth ran it in 24, so Seth ran the race the fastest!
