Answer:
3rd. row becomes [0 0 -6 1]
Step-by-step explanation:
The element of pivot is the 9 in the 2nd row, so the 1st and 2nd rows stays the same.
For the 3rd row we have to calculate in each column, the element of the 3rd row minus the element of the 2nd row, and put it in the 3rd row.
This way we have <em>four operations</em> as follow:
for columns 1 to 4 in that order.
With this procedure, the system becomes
[1 –2 3 1]
[0 9 2 –5]
[0 0 –6 1]
Answer: the first graph
Reasoning: When a graph is going left to right it is a decay while when it’s going right to left it is an increase... think of linear equations where if it is going from left to right the slope is negative, it’s the same for the exponential decay and increase.
The answer is in the question. The question says he used 2/3 of it to make sandwiches. Unless your asking what 2/3 of 7/8 is then the answer would be 7/12.
you just multiply the top numbers together and the bottom numbers together and then reduce.
180 ÷ 1.5 = 120
Check your answer - 120 × 1.5 = 180
Final answer: 120 miles.