Answer:
coefficent matrix
Step-by-step explanation:
P. 366
"If the column of constant terms is not included, the matrix reduces to that of the coefficent matrix of the system"
-1 -3 -1
9 -9 -1
-1 -3 4
find 1/2 then add the two base the multiply the h and divide by two
The distance of the boat on the right to the finish line is 297.29 m and the distance of the boat on the left to the finish is 294.11 m, so the boat on the left will reach the finish line faster.
<h3>How do you know which boat will reach the finish line faster?
</h3>
The image shows two triangles of which we know an angle and the value of the opposite leg. Therefore, we can perform a mathematical operation to know the value of the hypotenuse of these triangles, which would be the distance of the boats to the goal as shown below.
h = hypotenuse
Sen 22° = 
h = 
h = 
h = 297,29 m
Sen 20° = 
h = 
h = 
h = 294,11 m
According to the above, the distance of the boat on the left is less, so it can be inferred that this boat will reach the finish line faster.
Learn more about triangles in: brainly.com/question/2269348
Answer:
B. 4x ≤ 320
Step-by-step explanation:
Not sure how to explain my thinking. However, 4x must be smaller than 320 because she cannot spend more than that.