Final answer:
"I am an odd number. I am more than 40. I am less than 42. I am 41"
Explanation:
This problem can be solved through basic number sense. We are dealing with a specific subset of numbers - odd numbers. We are told that this number is more than 40 and less than 42. Thus, the number we're looking for here is essentially the only odd number that falls between 40 and 42, which is 41.
When you say you are an odd number that is more than 40 and less than 42, there is only one number that fits this criteria: 41. In the range between 40 and 42, the only odd number is 41.
Learn more about Odd Numbers here:
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–6 only
–2, 1, or 3 only
–6, –2, 1, or 3 only
Answer:
answer will be 0
plz mark me as brainliest
B.42
C.60
D.76
Answer:
To solve the system of linear equations using Gaussian elimination, we'll write the augmented matrix and perform row operations to transform it into row echelon form.
The given system of equations:
-2x_1 + 3x_2 + x_3 = 2
-3x_1 + 4x_2 + 2x_3 = 2
x_1 - 5x_2 + 4x_3 = -9
-2x_1 + 4x_2 - 4x_3 = 8
Writing the augmented matrix:
[ -2 3 1 | 2 ]
[ -3 4 2 | 2 ]
[ 1 -5 4 | -9 ]
[ -2 4 -4 | 8 ]
1. Row 1 Ã (-3) + Row 2 â Row 2:
[ -2 3 1 | 2 ]
[ 9 -13 -5 | -6 ]
[ 1 -5 4 | -9 ]
[ -2 4 -4 | 8 ]
2. Row 1 Ã (1/2) + Row 3 â Row 3:
[ -2 3 1 | 2 ]
[ 9 -13 -5 | -6 ]
[ -1 (3/2) 2 | -5/2]
[ -2 4 -4 | 8 ]
3. Row 1 Ã (-1) + Row 4 â Row 4:
[ -2 3 1 | 2 ]
[ 9 -13 -5 | -6 ]
[ -1 (3/2) 2 | -5/2]
[ 0 7 -3 | 6 ]
4. Row 2 Ã (-9/7) + Row 3 â Row 3:
[ -2 3 1 | 2 ]
[ 9 -13 -5 | -6 ]
[ -1 0 (59/7) | -(23/7)]
[ 0 7 -3 | 6 ]
5. Row 2 Ã (2/3) + Row 4 â Row 4:
[ -2 3 1 | 2 ]
[ 9 -13 -5 | -6 ]
[ -1 0 (59/7) | -(23/7)]
[ 0 0 (-11/7) | 0 ]
6. Row 3 Ã (-14/11) + Row 4 â Row 4:
[ -2 3 1 | 2 ]
[ 9 -13 -5 | -6 ]
[ -1 0 (59/7) | -(23/7)]
[ 0 0 1 | 0 ]
7. Row 3 Ã (1/2) + Row 1 â Row 1:
[ -1 3/2 3/2 | (4/7) ]
[ 9 -13 -5 | -6 ]
[ -1 0 1 | 0 ]
[ 0 0 1 | 0 ]
8. Row 3 Ã (9/7) + Row 2 â Row 2:
[ -1 3/2 3/2 | (4/7) ]
[ 0 -26/7 -14/7 | -42/7 ]
[ -1 0 1 | 0 ]
[ 0 0 1 | 0 ]
9. Row 3 Ã (1/2) + Row 4 â Row 4:
[ -1 3/2 3/2 | (4/7) ]
[ 0 -26/7 -14/7 | -42/7 ]
[ -1 0 1 | 0 ]
[ 0 0 1 |
On Monday at 1pm, when the ocean’s surface was at an elevation of 2.2 feet, Winston went to a surf shop that was 8.2 feet above the ocean’s surface. At 7 p.m. when the ocean’s surface was at an elevation of -2.4 feet, Winston ate dinner at a restaurant whose deck was 10 feet above the ocean’s surface.
What was the net change in the elevation of the ocean’s surface from 1 p.m. to 7 p.m.?
Answer:
-4.6 ft
Step-by-step explanation:
The question is asking for the net change in the ocean's surface elevation, so we can ignore the parts of the question that mention his own elevation at the time of the measuring. We can see at 1, the elevation was 2.2, and at 7, the elevation was -2.4. The net change is the whole change over the period of time, so we just need to find the difference between the two. Adding them together gives you the distance from each elevation the sea's surface was, which is -4.6 ft as the elevation decreased