PLEASE HELP!!!!
1 answer:
Answer:
B.
Step-by-step explanation:
Let w represent the number of weeks.
We have been given that a wrestler currently weighs 189 pounds and is losing 0.5 of a pound per week. So the weight lost by wrestler in w weeks would be .
The total weight of wrestler after w weeks would be:
We are also told that the wrestler needs to weigh more than 165 pounds but less than or equal to 185 pounds. This means that total weight of wrestler should be less than or equal to 185 pounds and greater than 165 pounds.
We can represent this information in an inequality as:
Therefore, option B is the correct choice.
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Answer:
Step-by-step explanation:
The augmented matrix of the system is:
First we find the stepped form of A (REF):
1. We subtract 3/5 from row 1 to row 2 (R2- R1) and get the matrix
Note that this matrix is in echelon form.
Now we find the reduced row echelon form of the augmented matrix (RREF)
2. From the previous matrix, we multiply the first row by 1/5 and the second row by -5/7 and obtain the matrix:
3. From the previous matrix, to row 1 we add 1/5 of row 2 (R1 +R2) and we obtain the matrix
which is the reduced row echelon form of the augmented matrix.