the average temperature in Fairbanks Alaska in February is 4 degrees below zero write the temperature as an integer
1 answer:
You might be interested in
9514 1404 393
Answer:
(x, y, z) = (-3, -1, 3)
Step-by-step explanation:
Many graphing calculators can solve matrix equations handily. Here, we use a combination of methods.
Use the last equation to write an expression for z.
z = 4 -x +4y
Substitute this into the second equation:
y -4(4 -x +4y) = -13
y -16 +4x -16y = -13
4x -15y -3 = 0
In genera form, the first equation can be written as ...
3x +y +10 = 0
Now, the solution to these two equations can be found to be ...
x = (-15(10) -1(-3))/(4(1) -3(-15)) = (-150 +3)/(4+45) = -3 . . . using "Cramer's rule"
y = -(10 +3x) = -(10 -9) = -1 . . . . from the first equation
z = 4 -(-3) +4(-1) = 3 . . . . . . . . from our equation for z
The solution to the system is (x, y, z) = (-3, -1, 3).
_____
<em>Additional comment</em>
Written as an augmented matrix, the system of equations is ...
Using proportions, it is found that his DAILY RATE on that particular day is of Php 2,420 .
- This question is solved by proportions, using a <em>rule of three.</em>
- In a regular 8-hour day, Allen earns Php 1420. How much will he earn on a 14 hour day?
The <em>rule of three</em> is:
8 hours - Php 1420
14 hours - x
Applying cross multiplication:
The closest option is Php 2,420.
A similar problem is given at brainly.com/question/24372153