Answer:
b. The system is not in echelon form because the system is not organized in descending "stair step" pattern so that the index of the leading variables increases from the top to bottom.
Step-by-step explanation:
The given linear system has a equation which is not in echelon form. The echelon is a system which divides the data into rigid hierarchal groups. The given linear equation in not in echelon form as the leading variables are increased from top to bottom indicating descending stair step pattern.
9514 1404 393
Answer:
4 : 7
Step-by-step explanation:
The ratio of perimeters is exactly the same as the ratio of side lengths. Multiplying each side by 7/4 multiplies the sum of the sides by 7/4.
The ratio of perimeters is 4 : 7.
Answer:
B. 20x + 15
Step-by-step explanation:
Get rid of the parenthesis and combine like terms: 18x + 2x and 9k + 6k
You get: 20x + 15.
Answer: Rounded to the nearest tenths place, it is 3.7 meters.
Step-by-step explanation:

Using the above formula, let's multiply 2.5 times 2.5 and 4.5 times 4.5.
2.5 times 2.5, or 2.5 squared, equals 6.25
4.5 times 4.5, or 4.5 squared, equals 20.25

Now, let's subtract 20.25 minus 6.25. The difference is 14.00.
What is the square root of 14? It is 3.74165739. Let's round that number to the nearest tenths place.
What is the number in the tenths place? It is 7. And--what is the number that comes after it? Well, it is 4. Therefore, the 7 should stay a seven. If the number next to the tenths place was five or greater, then we should add one.
Answer:
57
Step-by-step explanation: